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Cat face 2x(x+1)-3(x+4)=2x(x-3)+8

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Răspuns :

2x²+2x-3x+12=2x²-6x+8
(2x² cu 2x² se reduc)
2x-3x+6x=12+8
5x=20
x=4
2x^2+2x-3x-12=2x^2-6x+8
<=> -x+6x=8+12 =>5x=20 => x=4