The equation is .
Solve by graphing.
\ (Subtract 5x from each side)
(Simplify)
(Add 30 to each side)
(Simplify)
(Divide each side by 10) \ \
(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 +2 \ | \
\
f(x) \ | \
\
(x, f(x)) \ | \
\
1 \ | \
\
= 1 +2 \ | \
\
3 \ | \
\
(1, 3) \ | \
\
2 \ \ \ | \
\
= 2 +2 \ | \
\
4 \ | \
\
(2, 4) \ | \
Use these ordered pairs to graph the equation.
\1. Draw a coordinate plane.
\2. Plot the points.
\3. Draw a line through these points.
\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
.