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OpenStudy (anonymous):
What are the methods in solving a quadratic equation by completing the squares?
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OpenStudy (anonymous):
ask satellite..it's his fave topic
OpenStudy (anonymous):
very funny
OpenStudy (anonymous):
would you like to do an example? \[x^2+6x-2=0\] \[x^2+6x=2\] \[(x+3)^2=2+3^2=2+9=11\] \[x+3=\pm\sqrt{11}\] \[x=-3\pm\sqrt{11}\]
OpenStudy (anonymous):
OpenStudy (anonymous):
if you repeat the method with \[ax^2+bx+c=0\] you get \[x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}\]
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OpenStudy (anonymous):
Totally forgot that this is how you get the last formula :-) Good to come here
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