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2014-07-13T19:20:12-03:00
A)
x⁴=16
x=±⁴√16
x=±8
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b)
x⁴-6=75
x⁴=75-6
x⁴=69
x=±⁴√69
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c)
x⁴+75=-6
x⁴=-75-6
x=⁴√-81
x=±3i
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d)
3x⁴-7=-4
3x⁴=-4+7
3x⁴=3
x⁴=3/3
x⁴=1
x=⁴√1
x=±1
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a)
[√(x+1)]²=[4]²
x+1=16
x=16-1
x=15
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b)
2(5+√x)=14
10+2√x=14
2√x=14-10
2√x=4
√x=4/2
√x=2
x=2²
x=4
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