Question

(√2a-√5b)^3 use the identity to find the answer

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Answer 1

Answer:

(a-b)³ = a³-b³-3ab(a-b)

= a³-b³-3a²b+3ab²

(√2a-√5b)³ = (√2a)³-(√5b)³-3(√2a)²(√5b)+3(√2a)(√5b)²

= 2a√2a - 5b√5b - 6a√5b + 15b√2a.

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