Question

what will be the answer of question 4​

Answer 1

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

$- {x}^{3} - 3 {x}^{2} y - 3 {y}^{2} \: should \: be \: added \: to \\ ({x}^{3} + 3 {x}^{2} y + 3 {y}^{2} x + {y}^{3} ) \: to \: get \: {x}^{2} + {y}^{3}$

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