Question

Write the following in expanded form:
(a) (1) (2x + 3y)^3​

Answer 1

$(2x + 3y)(2x + 3y)(2x + 3y)$

Answer 2

Answer:

(a + b)^3 = a^2 3+ b^3 + 3a^2b + 3ab^2

(2x + 3y)^2

= (2x)^3 + (3y)^3 + 3(2x)^2×(3y) + 3(2x)(3y)^2

=8x^3 + 27y^3 + 36x^2y + 54xy^2