Question

pls help
$x {}^{2} + y {}^{2} = 34. \\ xy = 10 \\ 2(x + y) {}^{2} + (x - y) {}^{2} = {?}$

Answer 1

$2(x +y)^2 + (x-y)^2$

$2[x^2 +y^2 +2xy] + [x^2 +y^2 -2xy]$

$2[ 34 + 2(10)] + [ 34 -2(10)]$

72 + 40 + 34 - 20 

72 + 34 + 40 - 20


106 + 20 

126 




i hope this will help you


-by ABHAY

Answer 2

Answer:

⭐ SOLUTION ⭐

2(x-y)² + (x+y)²

=> 2[x²+y²+2xy] + [x²+y²-2xy]

=> 2[34+2(10)] + [34-2(10)]

=> 72+40+34-20

=> 72+34+40-20

=> 106+20

=> 126✔

HOPE IT HELP YOU