Question

Factorize this (x^2+x)^2+4(x^2+x)-21
Class 9 ICSE S chand Question

Answer 1

Answer:

Step-by-step explanation:

(x²+x)²+4(x²+x)-21

let x²+x=a

→a²+4a-21

→a²+7a-3a-21

→a(a+7)-3(a+7)

→(a-3)(a+7)

by placing value of a

(x²+x-3)(x²+x+7) answer