# Mini-Quiz: Derivation of Quadratic Formula

by Ron Kurtus (revised 17 August 2012)

Take this Mini-Quiz to check your understanding of the lesson material.

1. Why would you start the derivation going backwards?

You can see the steps used in a clever derivation

It is just done to trick you

The equation should be written backwards instead

2. What does (2ax + b)(2ax + b) equal?

It cannot be solved

4a2x2 + 4abx + b2

4a2x2 + b2

3. What does ± stand for?

Any value can be used

Minus a plus is zero

Plus or minus

If you got all three correct, you are on your way to becoming a Champion in Algebra. If you had problems, you had better look over the material again.

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