Question

if 3x+2y=12 and xy=6, find the value of <br />${9x}^{2} + {4y}^{2}$<br />.( hint: use identity<br />${(x + y)}^{2} = {x}^{2} + {y}^{2} + 2xy$<br /> to substitute values)​

Answer 1

Step-by-step explanation:

3x+2y=12

sq. bith sides

9x²+4y²+12xy=144

=144-12(6)

=12(12-6)

=12×6

=72