daze
Solve x2 + 4x + 8 = 0



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BluFoot
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You have to use the quadratic equation, do you know it?

daze
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no

BluFoot
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\[x=\frac{ b \pm \sqrt{b^24ac} }{ 2a }\]

nickersia
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ax2+bx+c=0
Formula: (b+sqrt(b squared 4*a*c))/2a

daze
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so?

BluFoot
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a=1, b=4, c=8, plug 'em in

daze
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x equals negative 2 plus or minus 4 I?

daze
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BluFoot?

nickersia
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+ stands for two possible resoults, both are correct

jazy
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\[ax^2 + bx + c = 0\]\[x^2 + 4x + 8 = 0\]a = 1
b = 4
c = 8 \[x=\frac{ b \pm \sqrt{b^24ac} }{ 2a } \] As BluFoot mentioned, just plug them in.\[x=\frac{ (4) \pm \sqrt{(4)^24(1)(8)} }{ 2(1) } \]

jazy
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Now lets simplify that a bit.
\[x=\frac{ (4) \pm \sqrt{(4)^24(1)(8)} }{ 2(1)} \]
\[x=\frac{ (4) \pm \sqrt{1632} }{ 2 }\]

daze
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x equals negative 4 plus or minus 4 I?

daze
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jazy?