Completing the Square Method… plus finding the sum and product of roots.

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Presentation transcript:

Completing the Square Method… plus finding the sum and product of roots

First of all, for these problems the Equation must equal 0.. When solving a quadratic equation, (using Quadratic Formula, Completing the Square, or Factoring) the equation must equal 0. Yes No, Need to put this in form.

Even if you prefer the quadratic formula… You still have to know the completing the square method!!

#16 from the January 2011 Algebra 2 Regents Exam: #16 from the January 2011 Algebra 2 Regents Exam:

#36 from the Fall 2009 Algebra 2 Regents (#’s worth 4 points)

#16 from the January 2011 Algebra 2 Regents Exam: #16 from the January 2011 Algebra 2 Regents Exam:

#36 from the Fall 2009 Algebra 2 Regents

If we have time…sum and product of roots…what does that mean? Many of you have come across and used these 2 formulas.

When you solve an equation, you figure out which value of x makes it true. This is also called finding the roots. SO REMEMBER, Solving is the same as finding roots when equation is in this form:

From our previous example…

ca

FOR WORK TIME TODAY: Revised briefs are due at end of class today If you have not revised your brief yet, you have until the end of this period to finish. Use peer feedback received Friday to make your brief great!!!