Question

please tell me how to do this ​

Answer 1

find value of x from 3x-2y=11 like x=11+2y/3

and put in xy=12 . u will get a quadratic eqn solve and u will get two or one value of x and find the value of y and put it there

ALETERNATE METHOD:-

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

here x=3x,y=2y

use

${(a - b)}^{2} = {a}^{2} + {b}^{2} - 2ab$

to find

$9 {x}^{2} + 4 {y}^{2}$