Question

$x + y = 7 \\xy = 12 \\ x {}^{2} + y {}^{2}$
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Answer 1

Answer:

$x + y = 7 \\ xy = 12 \\ {x}^{2} + {y}^{2} = (x + y)^{2} - 2xy \\ = 49 - 24 \\ =25$

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