Zero Factor Property in Minute 1! (Example 3)

Solving Quadratic Equations using the Zero Factor Property by Dr. Terri J. Speights, Professor at Palm Beach State College
#factoringtrinomials #quadraticequation #zerofactorproperty
If you did not understand how this problem was solved, please review the detailed videos on the Zero Factor Property. • Zero Factor Property E...

[@pjanderson4876]

Quickest way to approach this would be plugging in your answer choices in the calculator. When I’m teaching my students, I usually teach them the “Honest” method, like you did, but then I show them the quick method and coach them on the best times to use it.

[@MathExamPrep]

Thank you, I appreciate your feedback, please feel free to post here, how this method works! Thanks for watching!😃

[@pjanderson4876]

@@MathExamPrep So depending on what level of math they’ve taken, what calculator they have, and how comfortable they are with their calculator, I have a couple different methods. There is only 5 x values in the answers, and notice how the left side can’t be negative, and if the x is negative, then the right side must be negative, so no need to check -7. That rules out two options. 7 is in both remaining options, so check 14. 2(14)^2 =392 and 21(14)-49=245 so B can’t be right. If you’re running out of time, pick C and keep moving. If you have time, check 7 and 7/2 in the same fashion.