Question

resolva as equações x ao quadrado -14 x -49=0

Answer 1

$x^{2} -14x-49=0\\\\A= 1 \ B = -14 \ C = -49 \\\\\large\begin{array}{l}\large\fbox{ \Delta=b^{2}-4.a.c } \end{array}\ \\\\ \Delta = -14^{2} -4.1.-49\\\\ \Delta = 196 + 196 \\\\ \Delta = 392 \\\\\ \large\fbox{ x = \dfrac {-b \pm \sqrt{\Delta} }{2.a} } \\\\\\ x = \dfrac {-14 \pm \sqrt{392}}{2.1}$