Given x = 1 / 2A + 1, y = 1 / 2A + A, z = A-3, find x2 + 2XY + y2-2xz + z2-2yz The problem is wrong, given x = 1 / 2A + 1, y = 1 / 2A + 2, z = A-3, find the value of x2 + 2XY + y2-2xz + z2-2yz, the answer is 36

Given x = 1 / 2A + 1, y = 1 / 2A + A, z = A-3, find x2 + 2XY + y2-2xz + z2-2yz The problem is wrong, given x = 1 / 2A + 1, y = 1 / 2A + 2, z = A-3, find the value of x2 + 2XY + y2-2xz + z2-2yz, the answer is 36

The original formula = (x + y) &# 178; - 2Z (x + y) + Z & # 178;
=(x+y-z)²
=(1/2a+1+1/2a+a-a+3)²
=(a+4)²
=a²+8a+16