Factorise 125a³-27b³+75a²b-45ab²
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7
clearly it's (5a - 3b )^3. ans ..
pls mark it as brainliest.
pls mark it as brainliest.
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17
125a³-27b³+75a²b-45ab²
=(5a)³-(3b)³+(5a)²(3b)-5a(3b)²
=(5a-3b)³
∵(a-b)³=a³-b³+3a²b-3ab²
=(5a)³-(3b)³+(5a)²(3b)-5a(3b)²
=(5a-3b)³
∵(a-b)³=a³-b³+3a²b-3ab²
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