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Question

The transformed equation of x4+4x3+2x2−4x−2=0 by eliminating second term is

A
x4+4x2+1=0
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B
x4+4x21=0
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C
x44x2+1=0
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D
x42x2+1=0
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Solution

The correct option is C x44x2+1=0
Here, second term is nothing but x3
h=a4na3
Substitute x=y+h
x=y1
x44x2+1=0

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