How do you solve absolute value equation #4abs(2y - 7) + 5 = 9#?
2 Answers
Mar 31, 2015
There are several ways to approach this. One method which tends to avoid extraneous results is to isolate the absolute value on one side of the equation, square both sides, and solve the resulting quadratic equation.
implies
by factoring
therefore
or
Mar 31, 2015
Absolute value equations usually have two solutions
First we simplify, we subtract 5 on both sides and then divide by 4:
For
For
For
graph{|2x-7| [-1.19, 11.304, -1.313, 4.93]}