Question

What is the answer of
4m^2-3[m-2{3m-(m^2-5)}] ?

Answer 1

>8m-3[m-2{3m-(2m-5)}]

>8m-3[(m-2)(m-5)]

>8m-3(m²-5m-2m+10)

>8m-3(m²-7m+10)

>8m-3m²+21m-30

>-3m²+29m-30