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Question

Find the quadratic equation in x, whose roots are (m+n) and (m−n)

A
x2+2mx+(m2+n2)=0
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B
x22mx+(m2n2)=0
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C
x2mx+(m2n2)=0
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D
x2mnx+(m2n2)=0
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Solution

The correct option is D x22mx+(m2n2)=0
Roots are (m+n) & (m-n)
sum of roots = m+n+m-n=2m
product of roots = (m+n)(m-n)
=m2n2
equation
x2-(sum of roots)x+product of roots = 0
x22mx+m2n2=0

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