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

Răspuns :

(2x-1)²=4x²-4x+1

Se aplica formula:
(a-b)²= a²- 2*a*b+b²
(2x-1)²=(2x)²-2*2x*1+1² 
            = 4x
²-4x+1

[tex]\boxed{(a-b)^2=a^2-2*a*b+b^2}[/tex]

Mult noroc!