If x + y = 20 and \(\rm \sqrt {\frac{x}{y}} \, + \,9\, = 11 \, - \sqrt {\frac{y}{x}} \), then what is the value of 3x2 + 2xy + 7y2?
1
450
2
300
3
1200
4
750
If x + y = 20 and \(\rm \sqrt {\frac{x}{y}} \, + \,9\, = 11 \, - \sqrt {\frac{y}{x}} \), then what is the value of 3x2 + 2xy + 7y2?