expand (5a - 3b ) ^3.
Answers
Answered by
6
Answer:
124a^3 - 27b^3 +45ab.
hope its helpful
Answered by
8
Answer:
125a^3-225a^2b+135ab^2-27b^3
Step-by-step explanation:
(5a-3b)^3
(x-y)^3=x^3-3x^2y+3xy^2-y^3
(5a-3b)^3=(5a)^3-3(5a)^2(3b)+3(5a)(3b)^2-(3b)^3
=125a^3-3(25a^2)(3b)+3(5a)(9b^2)-27b^3
=125a^3-225a^2b+135ab^2-27b^3
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