# LESSON 9-9 PROBLEM SOLVING THE QUADRATIC FORMULA AND THE DISCRIMINANT ANSWERS

### LESSON 9-9 PROBLEM SOLVING THE QUADRATIC FORMULA AND THE DISCRIMINANT ANSWERS

Take the square root of both sides. The height of the trapezoid is twice as long as the shorter base and the longer base is twice as long as the height. The ringer will not reach a height of 20 feet. What is the length of the longer base? Method 4 Solve using the Quadratic Formula. L pg x3, skip 21, 54, add 23, 53 63 use another method. My presentations Profile Feedback Log out. Round to the nearest foot. Method 2 Solve by factoring. Substitute 1 for a, —1 for b, and —20 for c. Use the Quadratic Formula.

Method 2 Solve by factoring. Entering —b for negative values of b. Recall that quadratic equations can have two, one, or no real solutions. To use this website, you must agree to our Privacy Policyincluding cookie policy. Registration Forgot your password?

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Method 4 Solve using the Quadratic Formula. A community swimming pool is in the shape of a trapezoid. L pg x3, skip 21, 54, add 23, 53 63 use another method.

There are two real solutions b2 — 4ac is zero. Write as two equations. The object will reach its maximum height of 40 feet once. Substitute 1 for a, —1 for b, lessson —20 for c. Solving Using Different Methods. Take the square root of both sides.

Will it reach a height of 20 feet? The following table gives some advantages and disadvantages of the different methods. Sometimes one method is better for solving certain types of equations. My presentations Profile Feedback Log out. Check reasonableness Use a calculator: There are no real solutions b2 — 4ac is positive. Forgetting that your calculator knows orders of operation and does exactly what you tell it to do. Substitute 6 for a, 5 for b, and —4 for c.

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## The Quadratic Formula 9-9 and the Discriminant Warm Up

Round to the nearest foot. The Quadratic Formula is the only method that can be used to solve any quadratic equation. There is fornula real solution. Published by Branden Brown Modified over 4 years ago. You can determine the number of solutions of a quadratic equation by evaluating its discriminant.

Share buttons are a little bit lower. Forgetting to take the square root of the discriminate. Using the Discriminant Find the number of solutions of each equation using the discriminant.