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OpenStudy (anonymous):
Use the technique of completing the square to transform the quadratic equation into the form (x+c)^2=a. 10x^2+80x+220. Can some EXPLAIN how to do this?
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OpenStudy (amoodarya):
factor 10 10(x^2+8x+22) =10(x^2+8x+4^2-4^2+22)
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