Question

If x²+9y²=9 and xy=1, find (2 x +6 y)².
best answer will be mark as brainlist.

Answer 1

hey mate,
I tried my best
hope this helps you
_________❤️________

$= {(2x + 6y)}^{2}$
$= > 4 {x}^{2} + 36 {y}^{2} + 48xy$
$= > 4( {x}^{2} + 9 {y}^{2} ) + 48(1)$
$= > 4(9) + 48$
$36 + 48$
$= 84$
hope this helps you
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Answer 2

Answer is given in the picture...