What is the zero of the function?

Question

f(x)=x2−x−6x2−8x+15



Enter your answer in the box.

-2

Answer 1

I read that as
f(x) = x^2 - x - 6x^2 - 8x + 15
= -5x^2 -9x + 15

-5x^2 -9x + 15 = 0
5x^2 + 9x - 15 = 0
use the quadratic formula to solve.
Both zeros are irrational

Somehow I suspect you have a typo in your equation.

Answer 2

Use a graphing calculator or other technology to answer the question.

Which quadratic regression equation best fits the data set?



A. yˆ=0.728x2+20.213x+179.246

B. yˆ=0.728x2−20.213x+179.246

C. yˆ=179.246x2−20.213x+0.728

D. yˆ=0.728x2+0.564x+179.246

x y
4 109
6 88
9 52
15 42
18 50
21 78
23 98

Answer 3

The answer is D.yˆ=0.728x^2−20.213x+179.246

Took the test, that's correct