Question

Evaluate :- (2x+1)(x+2)(2x-1)​

Answer 1

Identity:- a^2-b^2 = (a+b)(a-b)

so...

>(2x+1) (x+2) (2x-1)

>[(2x)^2 -(1)^2] (x+2)

> (4x^2 - 1) (x+2)

:D