rozwiąż równania
x(x+4)=(x+1)(x+2)=
(x+3)(2x-2)=(2x+3)(x+1)
x(x+4)=(x+1)(x+2)
x²+4x=x²+2x+x+2
x²+4x-x²-2x-x=2
x=2
2x²-2x+6x-6= 2x²+2x+3x+3
2x²-2x+6x-2x²-2x-3x=3+6
-x=9/:(-1)
x=-9
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x(x+4)=(x+1)(x+2)
x²+4x=x²+2x+x+2
x²+4x-x²-2x-x=2
x=2
(x+3)(2x-2)=(2x+3)(x+1)
2x²-2x+6x-6= 2x²+2x+3x+3
2x²-2x+6x-2x²-2x-3x=3+6
-x=9/:(-1)
x=-9