Question

write down the expansion (a/5+b/2)3​

Answer 1

Step-by-step explanation:

As we know:- (a+b)^3= a^3 +b^3+3ab(a+b)

so.

={a/5}^3+{b/2}^3+3×a/5×b/2{a/5+b/2}

=a^3/125+b^3/8+3ab/10{2a+5b/10}