Question

(×/7- 2/7) (×/7+ 2/7)​

Answer 1

Explicación paso a paso:

$( \frac{x}{7} - \frac{2}{7} )( \frac{x}{7} + \frac{2}{7} ) \\ \frac{x - 2}{7} \times \frac{x + 2}{7} = \frac{x {}^{2} + x - 4}{49}$