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Question

If x = 2 - 3, then find the value of X21X2

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Solution

If x=23
x21x2=(x+1x)(x1x)=(23+123)(23123)=(4+343+123)(4+343123)=(843)(643)(23)2=4(/23)(643)(23)=8(323)23×(2+3)(2+3)=/48+243323/4843=83

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