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a fost răspuns

Calculati,utilizand formulele de calcul prescurtat:

a)(x+3)²+(x-1)²-2x²
b)(2x+7)²-(3x+5)²+(2x+5)
c)(x-4)²-(x-3)·(x+3)+2(x+1)²
d)(2x-3)²-4(x-6)·(x+6)+(x-9)(x+9)+x²
e)(5x-1)(5x+1)-(4x+3)²+2(3x-1)²
f)(3+2x)²-(x+2)·(x-2)+4(x-3)²
g)(6x-1)²-9(x-1)(x+1)+3(2x-7)2

DAU COROANA!!!!!

Răspuns :

A xla a doua +6x+9+xla a doua -2x+1-2x la a doua = -xla a doua+3x
B 4xla a doua +28+49-9xla a doua+30x-25+2x+5=-5xla a doua ce e atat de greu rezolva tu in continuare!

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