Question
The algebraic expansion of (x + y - z)2 is
-
x2 + y2 + z2 + 2xy + 2 yz + 2 zx
-
x2 + y1 + z2 + 2xy + 2yz - 2zx
-
x2 + y2 + z2 + 2xy - 2yz - 2zx
-
x2 + y2 + z2 - 2xy - 2yz - 2zx
Solution
C.
x2 + y2 + z2 + 2xy - 2yz - 2zx
