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(X+1)²+2(x-3)-5=(x+2)²-(x+3)+2

Răspuns :

= x²+2x+1+2x-6-5=x²+4x+4-x+3+2
=x²+4x-10=x²+3x+9
x² se simplifica
4x-10=3x+9
x=19
x²+1+2x+2x-6-5=x²+4+4x-x-3+2
1+2x+2x-6-5=4+4x-x-3+2
-10+4x=3+3x
4x=13+3x
x=13