Day: October 9, 2018

Precalc week 5

noahh2016 on

This week in Precalc we finished unit 3 and started to review factoring for the upcoming unit, “quadratic equations”.  In lesson 3.1 we reviewed how to factor easy trinomials, difference of squares trinomials, hard trinomials and perfect square trinomials.  these are all important things to know for the upcoming units.

difference of squares:

x^2-100 =(x-10)(x+10)

 

easy trinomials :

m^2+4m-45 =(m-5)(m+9)

 

hard trinomials :

5x^2+9x+4 =(5x+4)(x+1)

 

perfect squares :

9x^2+6x+1 =(3x+1)^2