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Rihanna Skinner
Mathematics
10 February, 19:59
The expansion of (x+y-z) ^2
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Maia Rivera
10 February, 20:09
0
x²+y²+z²+2xy-2yz-2zx
Step-by-step explanation:
{ (x+y) - z}^2
= (x+y) ²-2 (x+y) z+z²
=x²+2xy+y²-2zx-2yz+z²
=x²+y²+z²+2xy-2yz-2zx
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