Question

factorize (1) x² -
Чx - 21​

Answer 1

Answer:

here you go

Step-by-step explanation:

x²+3x-7x-21

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

=(x+3)(x-7)

Hope it helps

Answer 2

Step-by-step explanation:

x2-4x-21

=x2-7x-21

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

=(x-7)(x+3)