If the square of 4x + 4xy + 2Y = Y-1 / 4, find 2x + 4Y
Square of 4x + 4xy + y = - y + Y-1 / 4
-(2x + y) cube = (Y-1 / 2) cube
So 2x + y = 0, Y-1 / 2 = 0
y=1/2 x=-1/4
2x+4y=3/2
Simplify | 2x + 2Y + 4xy | = √ (4x & # 710; 2 + 4Y & # 710; 2) to the formula about X and y
|X+Y+XY|^2=√(Xˆ2+Yˆ2)^2 X^2 +Y^2 +X^2 Y^2 +XY+X^2 Y+XY^2 =X^2 +Y^2 X^2 Y^2 +XY+X^2 Y+XY^2=0 XY(X Y +1+X+Y)=0 XY(...