Question

Expand (-2x + 5y) cube

Answer 1

Answer:

Step-by-step explanation:

(-2x + 5y)³ = ?

We know that

(a + b)³ = a³ + b³ + 3ab(a+b)

So

(-2x+5y)³ = (-2x)³ + (5y)³ + 3(-2x)(5y)(-2x+5y)

= -8x³ + 125y³ -30xy(-2x+5y)

= -8x³ + 125y³ + 60x²y - 150xy²

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