simplify (4x+2y)^3 + (4x-2y)^3
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Step-by-step explanation:
(4x + 2y)³ + (4x - 2y)³
(4x+2y+4x-2y){(4x+2y)²-(4x+2y)(4x-2y)+(4x-2y)²}
(8x) { (4x+2y)² + (4x-2y)² - [(4x)² - (2y)²] }
8x { 2(16x² + 4y²) - 16x² + 4y² }
8x { 32x² + 8y² - 16x² + 4y² }
8x { 16x² + 12y² }
8x * 4 ( 4x² + 3y² )
32x ( 4x² + 3y² )
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