1. nubeer

$x = \frac{ -b \pm \sqrt{b ^{2}-4ac} }{ 2a }$ This is the quadratic formula... from your question x^2+2x+9=0 a=1, b = 2,c = 9.. now plug in values u will get 2 values of x

2. lacypennelll

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3. lacypennelll

Might want to close this question

4. P.nut1996

I got $x=-1\pm \sqrt{-18}$ which does not look right at all...

5. P.nut1996

My answer choices are: a. $x=-2\pm4i \sqrt{2}$ b. $x=-2\pm2i \sqrt{2}$ c. $x=-1\pm4i \sqrt{2}$ d. $x=-1\pm2i \sqrt{2}$