Question

what is a square + b square​

Answer 1

Answer:

${a}^{2} + {b}^{2} = \frac{ {(a + b)}^{2} + {(a - b)}^{2} }{2}$

Answer 2

Answer:

${a}^{2} + {b}^{2} \: = \: {(a + b)}^{2} - 2ab$

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