(ii) (5a + 4b)
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Answered by
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Step-by-step explanation:
(5a+4b)³
(5a)³+(4b)³+3(5a)(4b)× (5a+4b)
125a³+64b³+60ab(5a+4b)
125a³+64b³+300a²b+240ab²
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