Question

factorise the expression 125m cube +64n cube

Answer 1

=(5m+4n)^3
identity=(a+b)^3
=a^3+b^3+3ab(a+b)
(5m)^3+(4n)^3+3*5m*4n(5m+4n)
125m^3+64n^3+60mn(5m+4n)
125m^3+64n^3+300m^2n+240mn^2

Answer 2

Answer:

(5m+4n)^3

identity=(a+b)^3

=a^3+b^3+3ab(a+b)

(5m)^3+(4n)^3+3*5m*4n(5m+4n)

125m^3+64n^3+60mn(5m+4n)

125m^3+64n^3+300m^2n+240mn^2