Question

Indique o valor de x²-7x+5=0 usando equação de segundo grau.

Answer 1

Resposta:

$x = \frac{-(-7)±\sqrt{(-7)^2-4.1.5} }{2.1} \\\\x =\frac{7±\sqrt{49-4.1.5} }{2.1} \\\\x =\frac{7±\sqrt{49-20} }{2.1}\\\\x =\frac{7±\sqrt{29} }{2.1}\\\\x= \frac{7±\sqrt{29} }{2}\\\\x=\frac{7+\sqrt{29} }{2}\\\\x=\frac{7-\sqrt{29} }{2}\\\\x= \frac{7±\sqrt{29} }{2}$