Question

(x+y)^3 -(x-y)^3 what is the answer with sollution
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Answer 1

HEY MATE

AM HERE TO HELP YOU OUT

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$= ( {x + y})^{3} - ( {x - y})^{2} \\ =(x + y - (x - y)) \times (( {x +y })^{2} + (x + y)( x - y) + ( {x - y}))^{2} \\ = (x + y - x + y)( {x}^{2} + 2xy + {y}^{2} + {x}^{2} - {y}^{2} + ( {x}^{2} - 2xy + {y}^{2} )) \\ = (y + y) \times ( {x}^{2} + {y}^{2} + {x}^{2} - {y}^{2} + {x}^{2} + {y}^{2} ) \\ = 2y \times (3 {x}^{2} + {y}^{2} )$