If `2x-3y=5`, what is the value of `4x^(2)-12xy+9y^(2)`?

If 9+2(3x-xy+x^(2))+y^(2)=0 ,then what is the value of (3x^(2)-2xy+5y^(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 ((5x-y))/((5x + y)) =3/7, what is the value of ((4x ^(2) + y ^(2) -4 xy ))/( ( 9x ^(2) + 16 y^(2) + 24 xy)) ?

If x=4+(1)/(a) and y=2-(1)/(2a) , what is the value of (x^(3)+6x^(2)y+12xy^(2)+8y^(3)) ?

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

If (2x+3y):(3x+5y)=18:29, what is he value of x:y?