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a fost răspuns

a)(X -1) (x+1)-x(x+2)=x-10
b)x(x+5-(x-2)(x+3)=3(x+1)-11

C) (x+3) la a doua -2(x-1)=(x+4)(x-4)-5

Răspuns :

A)x la a 2-1-x la a 2-2x=x-10 -3x=-9 X=3 B)xla a 2+5x-(xla a 2-x+6)=3x+3-11 5x-x+6=3x-8 X=-14 C)x la a 2+6x+9-2x+2=x la a 2-16 -5 4x=-11-21 4x=-32 X=-8

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