Question

simplifica B=(x+7)(x-7)+49-x2

Answer 1

Explicación paso a paso:

$B=(x+7)(x-7)+49-x {}^{2}$

$B= {x}^{2} - 7x + 7x - 49 + 49 - {x}^{2}$

Reducir términos semejantes

$B= ( {x}^{2} - {x}^{2} ) + (7x - 7x) + (49 - 49)$

$B= 0 + 0 + 0$

$B= 0$