Question

Please simplify this (3x+y)3-(3x-y)3

Answer 1

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Hey Mate!!

(3x + y)3 - (3x - y)3

=> 3{(3x + y)(3x - y)}

=> 3{$(3x)^{2} - y^{2}$}

=> 3{$9x^{2} - y^{2}$}

=> $27x^{2} - 3y^{2}$

Answer 2

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