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OpenStudy (anonymous):
Use the quadratic formula to find the roots of the equation. x2 + 3x - 18 = 0 A. {-6, 3} B. {-2, 9} C. {-3, 6} D. {-9, 2}
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Directrix (directrix):
A. {-6, 3}
OpenStudy (anonymous):
r u sure it not 6 -3?
Directrix (directrix):
Here's the graph: http://www.wolframalpha.com/input/?i=x%5E2+%2B+3x+-+18+%3D+0
OpenStudy (anonymous):
oh k thankyou;0
Directrix (directrix):
The roots are not an ordered pair but a set of solutions. Order does not matter.
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