Chapter 9: Q5. (page 600)

Read each question. Then fill in the correct answer on the answer document provided by your teacher or on a sheet of paper.
Solve the quadratic equation below by graphing.
$x^{2} - 2 x - 15 = 0$
A $- 1, 4$
B $- 3, 5$
C $3, - 5$
D $ϕ$

Short Answer

Expert verified

The solution of the given quadratic equation $x^{2} - 2 x - 15 = 0$ are $- 3$ and 5. Therefore, option B is correct.

Step by step solution

Step 1. Draw the graph of the quadratic function y=x2−2x−15.

The graph of the quadratic function $y = x^{2} - 2 x - 15$ is:

Step 2. Determine the solution of the given quadratic equation x2−2x−15=0.

From the graph of the quadratic function $y = x^{2} - 2 x - 15$ , it can be noticed that the graph of the quadratic function $y = x^{2} - 2 x - 15$ is intersecting the $x$ -axis at $(- 3, 0)$ and localid="1647683740825" $(5, 0)$ .

That implies the solution of the quadratic equation $x^{2} - 2 x - 15 = 0$ are localid="1647683940785" $- 3$ and 5.

Therefore, option B is correct.

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Read each question. Then fill in the correct answer on the answer document provided by your teacher or on a sheet of paper.
Solve the quadratic equation below by graphing.
$x^{2} - 2 x - 15 = 0$
A $- 1, 4$
B $- 3, 5$
C $3, - 5$
D $ϕ$

Short Answer

Step by step solution

Step 1. Draw the graph of the quadratic function y=x2−2x−15.

Step 2. Determine the solution of the given quadratic equation x2−2x−15=0.

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Read each question. Then fill in the correct answer on the answer document provided by your teacher or on a sheet of paper.Solve the quadratic equation below by graphing.x2−2x−15=0A −1,4B -3,5C 3,-5Dϕ

Short Answer

Step by step solution

Step 1. Draw the graph of the quadratic function y=x2−2x−15.

Step 2. Determine the solution of the given quadratic equation x2−2x−15=0.

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Math Textbooks

Decision Maths

Applied Mathematics

Calculus

Probability and Statistics

Theoretical and Mathematical Physics

Pure Maths

Study anywhere. Anytime. Across all devices.

Read each question. Then fill in the correct answer on the answer document provided by your teacher or on a sheet of paper.
Solve the quadratic equation below by graphing.
$x^{2} - 2 x - 15 = 0$
A $- 1, 4$
B $- 3, 5$
C $3, - 5$
D $ϕ$