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  • 12-12-2017
  • Mathematics
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Which of the following is a solution of x2 + 2x + 8?

Which of the following is a solution of x2 2x 8 class=

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MuchoE
MuchoE MuchoE
  • 12-12-2017
Using the quadratic equation we get:
[tex] \frac{ - 2 + - \sqrt{4 - 32} }{2} = \frac{ - 2 + - \sqrt{ - 28} }{2} [/tex]

Factoring out 2 we get
[tex] \frac{ - 2 + - 2\sqrt{ - 7} }{2} = - 1( + - ) \sqrt{ - 7} [/tex]
Factoring out the imaginary number:
[tex] - 1 + \sqrt{7} i \: (and) \: - 1 - \sqrt{7} i[/tex]
So b.
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