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Mathematics 18 Online
OpenStudy (anonymous):

Use the quadratic formula to solve x² + 8x + 9 = 0. Estimate irrational solutions to the nearest tenth

OpenStudy (anonymous):

I got [-4 +- \sqrt{7}\] but i don't know what do do now?

OpenStudy (anonymous):

\[x=\frac{ -b +- \sqrt{b^2 -4ac}}{ 2a }\]

OpenStudy (anonymous):

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