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x² + x = x ² + 2x + 1 - 7x - 14
x = 2x + 1 - 7x - 14
x = -5x - 13
6x = -13
x = -13/6
Odp. Rozwiązaniem tego równania jest x = -13/6.
x²+x=x²+2x+2-7x-14
x²-x²+x+7x-2x=2-14
6x=-12
x=-2
x²+x= x²+2x+1-7x-14
x²-x²+x-2x+7x= 1-14
6x=-13 / :6
x= -13/6