Mathematics, 09.10.2021 02:20 katiemaley19

Prove that the expression can have only positive values: x^2+2x+2
4x^2-4x+6
a^2+b^2-2ab+1
x^2+y^2+z^2+2xy+5

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Prove that the expression can have only positive values: x^2+2x+2
4x^2-4x+6
a^2+b^2-2a...