Question

What are the zeros of f(x)=(x-3)(x+8) ? Select all that apply.

Answer 1

A) x = -8

B) x = 3

Explanation:

This quadratic is already factored so all we have to do is solve for the zeroes. We can separate the two factors of the quadratic into x-3=0 and x+8=0. Solve for x in both of the equations and we get the zeroes as x = 3 and x = -8.

Answer 2

3 and -8 are the zeroes of polynomial.

Option A and D are correct.

Explanation:

Given the polynomial

`f(x)=(x-3)(x+8)`

we have to find the zeroes of the above polynomial.

Zeroes of polynomial are those values which makes the value of polynomial 0 when substituted.

∴ to find the zeroes we have to substitute the polynomial equals to 0

`f(x)=(x-3)(x+8)=0`

which implies

`x-3=0, x+8=0`

`x=3, x=-8`

Hence, 3 and -8 are the zeroes of polynomial.

Option A and D are correct.