Identify the factors of x2 − 4x − 21. (x − 7)(x + 3) (x + 7)(x − 3) (x + 21)(x − 1) (x − 21)(x + 1)

x^2-4x-21

= x^2-7x+3x-21

= x(x-7)+3(x-7)

= (x-7)(x+3)

The factor of x^2-4x-21 is (x-7)(x+3).

s

step-by-step explanation:

8

step-by-step explanation:

just put √(2) * √(32) into a calculator. that will make the answer be 8.