Day: November 13, 2018

week 10 – Precalc 11

noahh2016 on

This week in Precalc we had our midterm Wednesday.  We started unit 5 with solving inequalities with one variable (x).  We found that when solving for x we can use the answer to create an inequality based on the sign of inequality.

Ex :

4x^2+8x+3 \textgreater 0

 

(4x^2+6x)(2x+3) \textgreater 0

 

(2x+1)(2x+3)

 

x= \frac{-1}{2} and \frac{-3}{2}

We can use a number line or graph to write solutions for the quadratic function.

x \textless \frac{-3}{2}

 

x \textgreater \frac{-1}{2}