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(2x+3)(x+1)+4(x+1)=0


Răspuns :

Factor pe x+1 si ai:
(x+1)(2x+3+4)=0
(x+1)(2x+7)=0
x+1=0 sau 2x+7=0
x=-1 sau 2x=-7
x=-1 sau x=-7/2
(2x+3) * (x+1) * 4*(x+1) = 0 (2x+3) * (x+1) * 4x+4 = 0 2x+3 * 4x +4 = 0 6x + 12 = 0 / - 12 6x = -12 / :6 X= 2