# QUADRATIC FORMULA

Part 1: Which part of the quadratic formula tells you whether the quadratic equation can be solved by factorization or not?

The answer to Part 1 is the discriminant, b² - 4ac.

Last but not least, it is most important for a student to be able to memorize the quadratic formula.

The answer to Part 1 is the discriminant, b² - 4ac.

- If the discriminant is negative, the roots are complex numbers. You could solve by quadratic formula .
- If the discriminant is 0, the roots are -b/2a and -b/2a (repeated roots). You could solve by factoring.
- If the discriminant is positive, and a perfect square, you can solve by factoring.

Last but not least, it is most important for a student to be able to memorize the quadratic formula.

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