Question

fatore: b^2 - c^2/16

Answer 1

Sabemos que:

${x}^{2} - {y}^{2} = (x + y)(x - y)$


Então:

${b}^{2} - \frac{ {c}^{2} }{16} = {b}^{2} - {( \frac{c}{4} )}^{2} = \\ = (b + \frac{c}{4} )(b - \frac{c}{4} )$