If the equation (A & # 178; - 4) x & # 178; + (2-3a) x + (a + 2) y + 3A = 0 is a quadratic equation with respect to X and y, then a=

If the equation (A & # 178; - 4) x & # 178; + (2-3a) x + (a + 2) y + 3A = 0 is a quadratic equation with respect to X and y, then a=

Once, the coefficient is 0
a²-4=0
a=±2
Binary then y coefficient is not equal to 0
a+2≠0
So a = 2