(5a - 6b)^3 simplify
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Step-by-step explanation:
( 5a) ³ - ( 6b) ³ - 90ab ( 5a- 6b)
25a -36b - 90ab ( 5a-6b)
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(5a-6b)³
now using identity
(x-y)³=x³-y³-3(xy)(x-y)
(5a-6b)³=(5a)³-(6b)³-3(5a*6b)(5a-6b)
=125a³-216b³-45a²b+54ab² is the answer
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