Question

the image is clear so plz answer fast

Answer 1

here's ur answer mate ..

$125x ^{3} + 1 ^{3} \\ 5x ^{3} + 1 ^{3 }$
applying(x+y)^3
we get
5x^3+1^3+3×5x×1(5+1)
5x^3+1^3+15x(5+1)
5x^3+1^3+45x+15x

Answer 2

Hop it will help you..