Question

expand:
(3a+5b)
power 3

Answer 1

(a+b)^3=a^3+b^3+ 3ab(a+b)
(3a+5b)^3 = 27a^3 + 125b^3+ 45ab(3a+5b)
27a^3+125b^3+135a^2b+225ab^2.

Answer 2

Use this formula in picture question.

$( {a - b)}^{3} = {a}^{3} - {b}^{3} - 3ab(a - b)$

For Your written question:-

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

PUT VALUE OF a AND b IN THIS FORMULA AND SOLVE.

HOPE IT HELPS YOU!