Question

factorise
9x4-(x2+2x+1)​

Answer 1

Answer:

9x^4-(x^2+2x+1)​

⇒ 9x^4- ( x^2+2x+1 )

⇒ 9x^4- (x+1) (x+1)

⇒ 9x^4-(x+1)^2

[ in the form of a^2-b^2=(a+b)(a-b) ]

⇒ (3x^2)^2-(x+1)^2

⇒ [(3x^2-(x+1)] [(3x^2+(x+1)]