Question

Al factorizar x2/49 - y2/9 el resultado es:

Answer 1

$\frac{ x^{2} }{49}- \frac{ y^{2} }{9} = \frac{ x^{2} }{ 7^{2} }- \frac{ y^{2} }{ 3^{2} }= ( \frac{x}{7} )^{2} -( \frac{y}{3} )^{2} =( \frac{x}{7}+ \frac{y}{3} ) ( \frac{x}{7}-\frac{y}{3} )$