Respostas

2013-12-10T20:25:50-02:00
A-(x-3)³
(x-3)(x-3)
x²-3x-3x+9
(x²-6x+9)(x-3)
x³-3x²-6x²+18x+9x-36
x³-3x²-6x²+18x+9x=36
x³-9x²=36-36
x³-9x²


b-(a+5)³
(a+5)(a+5)
a²+5a+5a+25
a²+10a+25
(a+5)(a²+10a+25)
a³+10a²+25a+5a+50a+125
a³+10a²+5a²+25a+50a=125
a³+15a²+75a=125
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