Expanded form of (1/3x -2/5y)^3
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using formuala (a-b) ³=a³-b³-3a²b+3ab²
1/27x³ -8/125y³-2/15x²y+4/25xy²
1/27x³ -8/125y³-2/15x²y+4/25xy²
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Answer:So we will solve this by using the formula (a-b)³=a³-b³-3ab(a-b)
Step-by-step explanation:=(1/3x)³- (2y/5y)³-3×1/3x×2y/5y(1/3x-2y/5y)
=1/27x³- 8y³/125y³- 2y/15x²y-4y²/25xy²
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