If 9 x square plus 25 y square is equal to 181 and is equal to minus 6 find the value of 3x + 5 y

If 9 x square plus 25 y square is equal to 181 and is equal to minus 6

1.	If 9 x square plus 25 y square is equal to 181 and is equal to minus 6 find the value of 3x + 5 y
Answer» 9x2+25y2=1819x2+25y2+30(xy)=181+30(-6)=1(3x+5y)2=13x+5y= 1,-1