Question
The expanded form of (x - y - z)2 is
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x2 + y2 + z2 - 2xy + 2yz - 2zx
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x2 + y2 + z2 - xy + yz - zx
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x2 + y2 + z2 + 2xy - 2yz - 2zx
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x2 + y2 + z2 + 2xy + 2yz + 2zx
Solution
A.
x2 + y2 + z2 - 2xy + 2yz - 2zx
