Question

Write the following cubes in the expanded form:
(i) (3a + 4b)3

Answer 1

(3a)^3 + (4b)^3 + 3(3a)(4b)( 3a+4b)

= 27a^3 + 64b^3 + 36ab(3a+4b)

= 27a^3 + 64b^3 + 108a^2b + 144ab^2

Answer 2

Ur answer is here
9a³+64b³+3×3a×4b(3a+4b)
9a³+64b³+36ab(3a+4b)
9a³+64b³+108a²b+144ab²
Hope it will help you