Question

(2x-1)^2,vreau si pasii :P

Answer 1

(2x-1)²=4x²-4x+1

Se aplica formula:
(a-b)²= a²- 2*a*b+b²

Answer 2

(2x-1)²=(2x)²-2*2x*1+1² 
            = 4x²-4x+1

$\boxed{(a-b)^2=a^2-2*a*b+b^2}$

Mult noroc!