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B
(x+1x2+3)(x+1x+3)
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C
(x2+x−3)(x+1x2+3)
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D
(x+1x−3)(x+1x+3)
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Solution
The correct option is D(x+1x−3)(x+1x+3) x2+1x2−11 Splitting -11 as the sum of (-2) and (-9), we have =(x2+1x2−2−9)(x+1x)2=x2−2+1x2 =(x+1x)2−9 We know a2−b2=(a+b)(a−b) =(x+1x)2−32 =(x+1x−3)(x+1x+3)