17-06-2015
Mathematics

contestada

using the quadratic formula to solve 7x^2-x-7=0

Respuesta :

Panoyin Panoyin

18-06-2015

[tex]7x^{2} - x - 7 = 0[/tex]
[tex]x = \frac{-(-1) \± \sqrt{(-1)^{2} - 4(7)(-7)}}{2(7)}[/tex]
[tex]x = \frac{1 \± \sqrt{1 + 196}}{14}[/tex]
[tex]x = \frac{1 \± \sqrt{197}}{14}[/tex]
[tex]x = \frac{1 + \sqrt{197}}{14}[/tex] [tex]or[/tex] [tex]x = \frac{1 - \sqrt{197}}{14}[/tex]

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