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JPurpz JPurpz
  • 17-06-2015
  • Mathematics
Answered

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

Verified Answer :

Panoyin
Panoyin Panoyin
  • 17-06-2015

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

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