if (x^2+3x+5)(x^2-3x+5)=m^2-n^2 then m is
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(X^2+5 +3x )(x^2+5 - 3x )
(x^2 +5 +3x)^2 - (x2+5 -3x)^2
on comparing
m = x^2 +5 + 3x
(x^2 +5 +3x)^2 - (x2+5 -3x)^2
on comparing
m = x^2 +5 + 3x
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