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2(x+3)la patrat-x(x-2)egal(x-1)la patrat+1

Răspuns :

Renatemambouko
2(x+3)²-x(x-2)=(x-1)²+1
2(x²+6x+9)-x²+2x=x²-2x+1+1
2x²+12x+18-x²+2x=x²-2x+2
12x+18+2x=-2x+2
14x+2x=-18+2
16x=-16
x=-1
Scumpk
2(x²+6x+9)-x²+2x=x²-2x+1+1
2x²+12x+18-x²+2x-x²+2x=2
16x+18=2
16x=2-18
16x= -16
x= (-16)÷16
x= -1

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