The equation is
.
Solve by graphing.
\
(Subtract x from each side)
(Simplify)
(Subtract 19 from each side)
(Simplify)
(Divide each side by 2) \ \
(Divide:
)
Solve by graphing.
\The equation is
.
The related function is
.
To graph the function make a table
\Draw a table
\| \
x \ | \
\
f(x) = x +3 \ | \
\
f(x) \ | \
\
(x, f(x)) \ | \
| \
1 \ | \
\
= 1 +3 \ | \
\
4 \ | \
\
(1, 4) \ | \
| \
2 \ \ \ | \
\
= 2 +3 \ | \
\
5 \ | \
\
(2, 5) \ | \
Use these ordered pairs to graph the equation.
\1. Draw a coordinate plane.
\2. Plot the points.
\3. Draw a line through these points.
\=x+3.gif\")
The graphintersects the x-axis at
, hence the solution is
.
Check:-
\To check the solution substitute
in equation
.
(substitute
)
(Multiply:
) \ \
(Subtract:
) \ \
The root of the equation
is
.