CarringtonKay CarringtonKay
  • 08-09-2015
  • Mathematics
contestada

X^2-6x+4=0
Please explain how to do quadratic formula with this problem.

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Panoyin
Panoyin Panoyin
  • 08-09-2015
[tex]x^{2} - 6x + 4 = 0[/tex]
[tex]\frac{-(-6) \± \sqrt{-(-6)^{2} - 4(1)(4)}}{2(1)}[/tex]
[tex]\frac{6 \± \sqrt{36 - 16}}{2}[/tex]
[tex]\frac{6 \± \sqrt{20}}{2}[/tex]
[tex]\frac{6 \± 2\sqrt{5}}{2}[/tex]
[tex]3 \± \sqrt{5}[/tex]
[tex]3 + \sqrt{5}[/tex]    [tex]or[/tex]    [tex]3 - \sqrt{5}[/tex]
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