Mini-Quiz: Derivation of Quadratic Formula

1. Why would you start the derivation going backwards?

   You can see the steps used in a clever derivationThat is correct. You understand equations. It is just done to trick youSorry, not correct. Try another button. The equation should be written backwards insteadGood try, but not right. Select another answer.

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

   It cannot be solvedSorry, not correct. Try another button. 4a2x2 + 4abx + b2Correct. You are doing great! 4a2x2 + b2Oops! Wrong answer. Re-read the question and try again.

3. What does ± stand for?

   Any value can be usedOops! Wrong answer. Re-read the question and try again. Minus a plus is zeroGood try, but not right. Select another answer. Plus or minusThat is correct. You understand equations.

Pick an answer to see instant feedback. Re-read the lesson if you miss one.