# How To Solve A Quadratic Word Problem ) And we know the total time is 3 hours: total time = time upstream time downstream = 3 hours Put all that together: Two resistors are in parallel, like in this diagram: The total resistance has been measured at 2 Ohms, and one of the resistors is known to be 3 ohms more than the other. The formula to work out total resistance "R = 3 Ohms is the answer. Quadratic Equations are useful in many other areas: For a parabolic mirror, a reflecting telescope or a satellite dish, the shape is defined by a quadratic equation.

) And we know the total time is 3 hours: total time = time upstream time downstream = 3 hours Put all that together: Two resistors are in parallel, like in this diagram: The total resistance has been measured at 2 Ohms, and one of the resistors is known to be 3 ohms more than the other. The formula to work out total resistance "R = 3 Ohms is the answer. Quadratic Equations are useful in many other areas: For a parabolic mirror, a reflecting telescope or a satellite dish, the shape is defined by a quadratic equation.

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Step IV: Solve this equation to obtain the value of the unknown in the set to which it belongs.x = -5 does not satisfy the conditions of the problem length or breadth can never be negative. In solving a problem, each root of the quadratic equation is to be verified whether it satisfies the conditions of the given problem.

Now you have to figure out what the problem even means before trying to solve it.

Therefore, we had to subtract 20 from both sides in order to have the equation set to 0.

You've now seen it all when it comes to projectiles! Hopefully you've been able to understand how to solve problems involving quadratic equations.

Don't be surprised if many of your exercises work out as "neatly" as the above examples have.

Many textbooks still engineer their exercises carefully, so that you can solve by factoring (that is, by quickly doing the algebra).I completely understand and here's where I am going to try to help!There are many types of problems that can easily be solved using your knowledge of quadratic equations.You may come across problems that deal with money and predicted incomes (financial) or problems that deal with physics such as projectiles.You may also come across construction type problems that deal with area or geometry problems that deal with right triangles.This actually never really occurred because the ball was shot from the cannon and was never shot from the ground. The other answer was 2.54 seconds which is when the ball reached the ground (x-axis) after it was shot.Therefore, this is the only correct answer to this problem.Let's first take a minute to understand this problem and what it means. So, here's a mathematical picture that I see in my head. The equation that gives the height (h) of the ball at any time (t) is: h(t)= -16t Now, we've changed the question and we want to know how long did it take the ball to reach the ground. The problem didn't mention anything about a ground. I'm thinking that this may not be a factorable equation. The first time doesn't make sense because it's negative.Let's take a look at the picture "in our mind" again. This is the calculation for when the ball was on the ground initially before it was shot.Your company is going to make frames as part of a new product they are launching.The frame will be cut out of a piece of steel, and to keep the weight down, the final area should be 28 cm when: x is about −9.3 or 0.8 The negative value of x make no sense, so the answer is: x = 0.8 cm (approx.) There are two speeds to think about: the speed the boat makes in the water, and the speed relative to the land: We can turn those speeds into times using: time = distance / speed (to travel 8 km at 4 km/h takes 8/4 = 2 hours, right?

## Comments How To Solve A Quadratic Word Problem

• ###### General Quadratic Word Problems - Purplemath
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General Quadratic Word Problems page 2 of 3 The width of the pathway will be 1.5 meters. You have to make a square-bottomed, unlidded box with a height of three inches and a volume of approximately 42 cubic inches. You will be taking a piece of cardboard.…

• ###### How to solve word problems with quadratic equations - YouTube
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How to solve word problems with quadratic equations. How to use word problems using quadratic equation. Geometry videos to help you figure out how to solve Math problems or review old Math.…

• ###### Quadratic Function Word Problem - YouTube
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Find when a thrown ball reaches a specific height using a quadratic function and factoring - includes the graph of the quadratic function.…

• ###### Quadratic word problem ball - Khan Academy
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Sal solves a word problem about a ball being shot in the air. The equation for the height of the ball as a function of time is quadratic. If you're seeing this message, it means we're having trouble loading external resources on our website.…

• ###### Real World Examples of Quadratic Equations - Math Is Fun
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A Quadratic Equation looks like this Quadratic equations pop up in many real world situations! Here we have collected some examples for you, and solve each using different methods Factoring Quadratics. Completing the Square. Graphing Quadratic Equations. The Quadratic Formula. Online Quadratic Equation Solver.…

• ###### Quadratic Word Problems Projectile Motion -
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Quadratic Word Problems Projectile Motion page 1 of 3 Usually the object is moving straight up or straight down. An object is launched at 19.6 meters per second m/s from a 58.8-meter tall platform. The equation for the object's height s at time t seconds after launch is s t = –4.9t2 + 19.6t + 58.8, where s is in meters.…

• ###### Word Problems Involving Quadratic Equations
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The equation that gives the height h of the ball at any time t is ht= -16t2 + 40ft + 1.5. Find the maximum height attained by the ball. Let's first take a minute to understand this problem and what it means. We know that a ball is being shot from a cannon. So, in your mind, imagine a cannon firing a ball.…

• ###### How to Solve Word Problems Requiring Quadratic Equations
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How to Solve Word Problems Requiring Quadratic Equations - Real Life Scenario Decide your variables. Write down any relationship between the two variables. Write down an equation that requires both the variables. Plug in the value for one of the variables in the equation. Simplify the equation.…

• ###### Word problems involving quadratic Equations with solutions.
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Quadratic Solver. A quadratic equation takes the form of ax2 + bx + c where a and b are two integers, known as coefficients of x2 and x respectively and c, a constant. Enter a, b and c to find the solutions of the equations. E.g. x 2 - x - 6 = 0 where a = 1; b=-1; c=-6.…

• ###### How to solve quadratic word problems - Quora
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To solve a quadratic word problem, you must first write down the root of the problem. ; You know b and c, but not a. Now from the text, you must find out what is the mathematical relation between a, b and c, and write it down as a formula. Then wether the formula is quadratic or not, solve it in the normal way.…