Question

$(m {}^{2} - n {}^{2}m) {}^{2} +2m {}^{3}n {}^{2}$
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Answer 1

Answer:

(m²-n²m)²+2m³n²

=(m²)²+(n²m)²+2(m²)(n²m)+2m³n²

=m^4+n^4m²+2m³n²+2m³n²

=m^4+n^4m²+4m³n²

Answer 2

$\left(m^2-n^2m\right)^2+2m^3n^2$

$=\left(m^2-mn^2\right)^2+2m^3n^2$

$=m^4-2m^3n^2+m^2n^4+2m^3n^2$

$=m^4+m^2n^4$