+0  
 
-1
193
1
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what is this ?

\(x = {-b \pm \sqrt{b^2-4ac} \over 2a}\)

Guest May 3, 2017
 #1
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+2

That is the quadratic formula, used in finding the x intercepts of a parabola. The two answers come from the +- in the equation being -b+-sqrt(...). 

Guest May 3, 2017

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