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Question

The solution set of x26|x|+8=0 is .

A
x=±2,x=±3
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B
x=±2,x=±4
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C
x=±3,x=±4
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Solution

The correct option is B x=±2,x=±4
Given x26|x|+8=0
(|x|)26|x|+8=0
(|x|)26|x|+8=0
(|x|2)(|x|4)=0
(|x|2)=0 or (|x|4)=0
|x|=2 or |x|=4
x=±2 or x=±4




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