Expand the following. (3x-2y) ^3
Answers
Answered by
0
Step-by-step explanation:
(a-b)^3=a^3-b^3-3ab(a-b)
=9x^3-4y^3-18xy(3x-2y)...
Answered by
2
Answer:
(a-b)^3=a^3-b^3-3a^2b-3ab^2
(3x-2y)^3=(3x)^3-(2y)^3-3*(3x)^2-3*3x-(3y)^2
=27^3-8y^3-3*9x^2*2y+3*3x*4y^2
=27x^3-8y^3-6y*9x^2+9x*4y^2
=27x^3-8y^3-54x^2y+36xy^2
Step-by-step explanation:
*first I write the formula of (a- b)^3
*then I put the value of a is = 3 X and b is = 2y
*then I solve the whole equation
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