(2x+3y)³ - (2x-3y)³
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(a+b)³= a³+b³ +3ab (a+b)
(a-b)³ = a³-b³ -3ab (a-b)
(2x+3y)³ - (2x-3y)³
{8x³ +27y³ +18xy(2x+3y)} - { 8x³-27y³ -18xy(2x-3y)}
8x³ +27y³ +18xy(2x+3y) - 8x³ +27y³ +18xy(2x-3y)
2×27y³ +36x²y + 54xy² +36x²y-54xy²
54y³ +36x²y+36x²y
54y³+72x²y
3y(18y² + 24x² )
9y(6y²+8x² )
18y(3y²+4x²)
Answered by
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72x²y + 54y³ is the answer.
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