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Quiz yourself on Quadratic FormulaGet your flashcardsBuild my revision planTrack my progressTHE Formula (Printed on the Higher Tier Formula Sheet)
For ax² + bx + c = 0:
x = (-b ± √(b² - 4ac)) / 2a
What each letter means:
- a = coefficient of x² (number in front of x²)
- b = coefficient of x (number in front of x)
- c = constant term (the number on its own)
The ± symbol means you do TWO calculations: once with + and once with -. This gives your two solutions!
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