Question

factorise 25x³y - 121 xy³

Answer 1

$25 { x}^{3} y - 121x {y}^{3} \\ \\ = xy(25 {x}^{2} - 121 {y}^{2} ) \\ \\ = xy( {(5x)}^{2} - {(11y)}^{2} ) \\ \\ = (xy)(5x + 11y)(5x - 11y)$

Answer 2

Here is your answer and mark me as brainlist. ....