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Mathematics 10 Online
OpenStudy (hippoharry):

SEE ATTACHMENT FOR QUESTION

OpenStudy (hippoharry):

OpenStudy (erak):

Do you know the quadratic formula?

Directrix (directrix):

QF attached.

OpenStudy (erak):

This one you can cheat a little, since the rest is the same. Just solve the discriminant: b^2 - 4ac And you should see the answer

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