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Mathematics

Simplify the following:

(3p - 4q)(9p2 + 12pq + 16q2)

Expansions

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Answer

(3p - 4q)(9p2 +12pq + 16q2) = (3p - 4q)[(3p)2 + (3p)(4q) + (4q)2]

We know that (a - b)(a2 + ab + b2) = a3 - b3

∴ (3p - 4q)[(3p)2 + (3p)(4q) + (4q)2] = (3p)3 - (4q)3

= 27p3 - 64q3

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