If `2x+3y=8` and `x y=2` , find the value of `4x^2+9y^2`

If 2x+3y=8 and xy=2, find the value of 4x^(2)+9y^(2)

If 2x+3y=8 and xy=2; then find the value of 4x^(2)+9y^(2)

If 3x+2y=12 and x y=6, find the value of 9x^2+4y^2

If 3x+2y=12 and x y=6 , find the value of 9x^2+4y^2

If 3x+2y=12 and xy=6, find the value of 9x^(2)+4y^(2)

If 3x+2y=12 and xy=6, find the value of 9x^(2)+4y^(2)

If 3x+2y=12 and xy=6, find the value of 9x^(2)+4y^(2)

If 2x + y = 23 and 4x - y = 19, find the values of x - 3y and 5y - 2x.

(i) x+2y=-7 and 3x-2y=-1, then find the value of x. (ii) If x+y=8 and 4y-x=2, then find the value of y. (iii) If 3x+5y=9 and 5x+3y=7, then find the value of x+y. (iv) If 3x-y=11 and x-3y=17, then find the value of x-y.