A hint to get started
Discard an always-positive factor safely
Self-Practice 1: solve .
CJC · Lecture · Self-Practice 1
Mark critical values and decide which are allowed before selecting intervals.
Read the worked solution
A hint to get started
Self-Practice 1: solve (x2+1)(4x2−1)≥0.
CJC · Lecture · Self-Practice 1
Mark critical values and decide which are allowed before selecting intervals.