Question

factorse the following xsquare -4x-21​

Answer 1

Answer:

heya mate there's your answer

x^2-4x-21

x^2-7x+3x-21

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

(x-7)(x+3)

hope it helps you

Thank you

Answer 2

Step-by-step explanation:

x²-4x-21

x²+3x-7x-21

(x²+3x)(-7x-21)

then we have to take out common from both sides.

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

(x-7) and (x+3)

x=7 and x=-3