Question

factorise: x² + 4x - 21​

Answer 1

Answer:

(x+7)(x-3)

Step-by-step explanation:

x^2+4x-21

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

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

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

= (x+7)(x-3)

Answer 2

Answer:

(x+7)(x-3) IS THE FACTORIZATION OF x²+4x-21

Step-by-step explanation:

x²+4x-21

x²+7x-3x-21

[(x²+7x)+(-3x-21)]

[x(x+7)-3(x+7)]

(x+7)(x-3)

I HOPE YOU UNDERSTOOD THE QUESTION