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12 questions from this quiz
The Quadratic Formula
It works for all quadratic equations
ax2+bx+c=0ax^2 + bx + c = 0ax2+bx+c=0
x=−b±b2−4ac2ax = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}x=2a−b±b2−4ac
222
−8-8−8
666
To prevent mistakes with minus signs
What's inside the square root
b2−4acb^2 - 4acb2−4ac
Two
Because of the ±\pm± in the formula
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