Using the quadratic formula - A grade exam question 3x2 + 7x - 13 = 0

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Using the quadratic formula - A grade exam question:

3x2 + 7x - 13 = 0

(3 x squared + 7 x - 13 = 0)

I hope the video helps and please do leave a comment - thanks.

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thank you I find your vids so helpful!!! for the new spec we need to know the formula off by heart right?

eliyawg
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Thank you so much for posting your videos online! You are so helpful to study math at home. I would never have understood on my own.

marynecharlie
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Thanks for the help, I did positive 49 X -39. Makes sense now!

xDave
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Thank you so much this helped loads with my GCSE revision however the formula isn't on the exam sheet anymore you have to remember it any tips?

SPARKI
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Thanks, this exact question came on my homework, and now I can answer it without even listening to anything you say :D

billiejoe
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how do I type the final equation on to the calculator? 

antoninomineo