4.1-4.2 · Equations, inequalities and graphs: the modulusLesson 1 of 11Free preview
The modulus: solving |ax + b| = c
The modulus |u| is the distance of u from zero, so it is never negative. |u| = c means u = c or u = -c.
4.1-4.2 · Equations, inequalities and graphs: the modulusLesson 1 of 11Free preview
The modulus |u| is the distance of u from zero, so it is never negative. |u| = c means u = c or u = -c.