Question

The expansion of (x +y –z) ^2 is
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Answer 1

Answer:

I think the answer is -

x^2+y^2-z^2

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Answer 2

Answer:

(a+b−c)

2

=(a)

2

+(b)

2

+(c)

2

+2ab−2bc−2ca

=(x)

2

+(y)

2

+(z)

2

+2xy−2yz−2zx

=x

2

+y

2

+z

2

+2xy−2yz−2xz