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April 19, 2014

Homework Help: Algebra--Correction?

Posted by Anonymous on Tuesday, October 13, 2009 at 5:45pm.

Solve x^2 -3x is greater than or equal to 10

Would the solutions be x=5 and x= -2?


Here's how I figured it.
x^2-3x is greater than or equal to 10.
I subtracted 10 from both sides. This left me with x^2-3x-10 is greater than or equal to 0. Next, I factored and came up with (x-5)(x+2) is greater than or equal to 0. Logically, it would follow that x=5 and x= -2 would it not? And then in symbolic form my answer would read x is less than or equal to -2 OR x is greater than or equal to 5.

Where, exactly, did I go wrong?

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