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Problem Solving (PS) | Re: If x = 9 is one solution to the quadratic x^2 yx + 27 = 0, what is

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Mental math. 9 is a negative. Its a case of (x- #)(x- #). The other figure is definitely 3.
-3+-9 = -12. But there's already a negative in the equation so its just 12. Easily can mess up between A and E here.

Statistics : Posted by Malar95 • on 15 Feb 2017, 02:27 • Replies 8 • Views 3388



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