Question

(4a-5b)^3 pls help fast



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Answer 1

Answer

:hello,

1)(4a+5b)³

(a+b) ³ = a³ +3a²b+ 3ab² +b³

(4a+5b)³ = (4a)³+ 3(4a)²(5b)+ 3(4a)(5b)²+(5b)³

= 64a³+ 240a²b + 300ab² + 125b³

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