Question

Write the following cubes in the expanded form :-
[a] {3a +4b}^3
[b] {5p-3q}^3

Answer 1

Answer:

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Answer 2

Answer:

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Step-by-step explanation:

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

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

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

=27a^3+64b^3+108a^2.b+144ab^2(ANS.)

[b]{5p-3q}^3

=(5p)^3-(3q)^3-3(5p)(3q)(5p-3q)

=125p^3-27q^3-45pq(5p-3q)

=125p^3-27q^3-225p^2q+135pq^2(ANS)