The equation is
.
Solve by algebraically.
\
(Subtract 22 from each side)
(Simplify)
(Divide each side by 2)
(Divide:
) \ \
The solution is
.
Solve by graphing.
\The equation is
.
The related function is
.
To graph the function make a table
\Draw a table
\| \
x \ | \
\
f(x) = 2x +22 \ | \
\
f(x) \ | \
\
(x, f(x)) \ | \
| \
| \
\
= 2( | \
\
4 \ \ \ | \
\
( | \
| \
| \
\
= 2( | \
\
2 \ | \
\
( | \
Use these ordered pairs to graph the equation.
\1. Draw a coordinate plane.
\2. Plot the points.
\3. Draw a line through these points.
\=2x+22.gif\")
The graph intersects the x-axis at
, hence the solution is
.
The root of the equation
is
.