Question

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Answer 1

Resposta:

$\frac{(x + 7) {}^{2} \times ( {x}^{2} - {7}^{2} ) } {(x - 7) {}^{2} } = \frac{(x + 7) {}^{2} \times (x + 7) \times (x - 7) }{(x - 7) {}^{2} } = \frac{(x + 7) {}^{3} }{x - 7}$