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Mathematics, 06.07.2019 09:00 emma6892

Worth 25 points, giving brainiest to a quick and good answer. i understand the following: $(x + y {)}^{2} = {x}^{2} + 2xy + {y}^{2} \\ (x - y {)}^{2} = {x}^{2} - 2xy + y$ but what if the operator is "plus or minus" like the quadratic formula? what does it equal in that case? i understand algebra pretty well in my opinion but i don't know what this would be.

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