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(x+2) la a doua -(x+1)(x-1) este....

Răspuns :

(x+2)la a doua=x la a doua+4x+4-x la a doua-1=3x+4 raspunsul
xla2+4x+4-[xla2-x+x-1]=x**+4x+4-[x**-1]=x**+4x+4-x**+1=4x+5=0 4x=-5 x=-5/4 x=-1,25