Question

Which of the given expressions results in 0 when evaluated at x = 5?

A. 5x(x-7)
B. (x-8)(x-5)
C. (x+7)(x-2)
D. (x+5)(x-8)

Answer 1

for this, i would use the process of elimination. plug 5 into each x on all four equations, and find which equation equals 0
5(5)((5)-7)=-50
((5)-8)((5)-5)=0
your answer is B

Answer 2

B. (x-8)(x-5).

Explanation:

Given : Equations .

To find : Which of the given expressions results in 0 when evaluated at x = 5.

Solution : We have given equations

We need the result zero.

We can see from the given equation (x-8) (x-5)

If we plug x = 5.

(5 -8 )( 5 -5).

-3 (0).

0. ( multiply with zero to any number it will always be zero )

Therefore, B. (x-8)(x-5).