Question

expand (5a - 3b ) ^3.​

Answer 1

Answer:

124a^3 - 27b^3 +45ab.

hope its helpful

Answer 2

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