Question

化简求值：(-m^4/m^2)^2+(-2m)^3*m^2+(-m^2)^4/m^4,其中m=-1

Answer 1

(-m^4/m^2)^2+(-2m)^3*m^2+(-m^2)^4/m^4

=(m²）²-8m³m²+m^8/m^4

=m^4-8m^5+m^4

=2m^4-8m^5

当m=-1时

原式=2×（-1）^4-8×（-1）^5=2+8=10