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Andraraluca81
a fost răspuns

(x+1)(2x+1)+2(x-1)(x+3) = -5

Răspuns :

2x²+x+2x+1+2(x²+3x-x-3)=-5
2x²+x+2x+1+2x²+6x-2x-6=-5
4x²+7x-5=-5
4x²+7x=-5+5
4x²+7x=o
S=Ф
AlleBiebs
2x la a doua + 2x+x+1+2(x la a doua -x +3x -3=-5 2x la a doua + 2x+x+1+2x la a doua-2 x +6x-6=-5 4x la a doua + 7x-5=-5 4x la a doua + 7x=-5+5 4x la a doua + 7x =0

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