a fost răspuns

(3x+1)totul la a2-(6x-2)totul la a2
(5x-1)totul la a2+(2x-1)(2x+1)
(2x-1)(5x+3)

Răspuns :

MFMask
(3x+1)²-(6x-2)²
se aplica formula a²-b²=(a-b)(a+b)
(3x+1-6x+2)(3x+1+6x-2)=(-3x+3)(9x-1)=-3(x+1)(9x-1)
(5x-1)²+(2x-1)(2x+1)=25x²-10x+1+4x²-1=29x²-10x=x(29x-10)
(2x-1)(5x+3)=10x²-5x+6x-3=10x²+x-3

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