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).

answer: 414,377,008

step-by-step explanation:

just multiply it

-22

times both sides by 2, times () by 8, add alile terms, move terms, add alike and caculate divide both sides by 3