Respostas

2014-02-09T00:01:05-02:00
X(x-4)=0
x²-4x=0








(x-1)(x+4)(4x-1)=0
(x²+4x-x-4)(4x+1)=0
(x²+3x-4)(4x+1)=0
4x³+x²+12x²+3x-16x-4=0
4x³+13x²-13x-4=0
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