Question

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

Answer 1

Hey

Here is your answer,

2xy +3y=8

Substitute xy=2 ,

2x2+3y=8
4+3y=8
3y=8-4
3y=4
y=4/3.

xy=2
x x 4/3 =2
X=2 x 3/4
X = 3/2

Hope it helps you!