(x+y)^3-(x-y)^3-6y(x^2-y^2) simplify this
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8y³
Step-by-step explanation:
[X+Y]³- [X-Y]³ - 6Y{X²-Y²}
= X³+3X²Y+3XY²+Y³- {X³-3X²Y+3XY²-Y³} - 6X²Y+6Y³
= X³+3X²Y+3XY²+Y³ - X³+3X²Y - 3XY² +Y³ - 6X²Y +6Y³
= 6X²Y+2Y³ - 6X²Y +6Y³
= 2Y³+6Y³
= 8Y³ --------------------------------> ANSWER:-
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