Respostas

2013-11-19T12:02:33-02:00
(2x)x + 4 = 32
2x² = 32 - 4
2x² = 28
x² = 28/2
x² = 14
x =  \sqrt{14}
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2013-11-19T12:11:26-02:00
(2x)x+4=32
2x²+4=32
2x²=32-4
2x²=28
x²=28/2
x= \sqrt{14}
Fatorando temos: 2 e 7
x= \sqrt{2 . 7}
1 4 1