Question

If

Answer 1

Answer:

162

Step-by-step explanation:

${ \sqrt{xy} } = 3$

$= > ( { \sqrt{xy} })^{2} = {3}^{2}$

$= > xy = 9$

Also ,

$x - y = 12$

$= > {(x - y)}^{2} = {12}^{2}$

$= > {x}^{2} + {y}^{2} - 2xy = 144$

Putting the value of 'xy' above gives :-

${x}^{2} + {y}^{2} - 2 \times 9 = 144$

$= > {x}^{2} + {y}^{2} = 144 + 18 = 162$