(2m-3n-4)*(4m*m+9n*n+6mn-12n+8m+16)
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Assume entire expression as x and then square it..
\sf \color{blue}You'll \: get \: an \: equation \: x^2 =3+x < /p > < p >You
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llgetanequationx
2
=3+x</p><p>
\color{red} \sf \: Then \: solve \: the \: quadratic \: equation x^2-x-3=0Thensolvethequadraticequationx
2
−x−3=0
X=( 1+√13) /2 which is the answer for your question.
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