Question

помогите решить:(1.3m^2+2.5n^2)^2

Answer 1

(1.3m^2+2.5n^2)^2=(1.3m^2)^2+2*1.3m^2*2.5n^2+(2.5n^2)^2=1.69m^4+6,5m^2n^2+6.25n^4