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10 February, 19:59

The expansion of (x+y-z) ^2

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  1. 10 February, 20:09
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    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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