Note:
Problem 3.1b:
Step 1:
Step 3:
Solve for x in the equation :
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Step 2:
The answers are and .
Step 4:
x = by substituting in the original equation
for x. If the left side of the equation equals the right side of the
equation after the substitution, you have found the correct answer.
Since the left side of the original equation equals the right side of the
original equation after we substituted for x, this confirms
that is a valid solution.
Check the solution x = by substituting in the
original equation for x. If the left side of the equation equals the right
side of the equation after the substitution, you have found the correct
answer.
Since the left side of the original equation equals the right side of the
original equation after we substituted for x, this confirms
that is a valid solution.
You can also check your answer by
graphing (the left side of the
original equation minus the right side of the original equation). You will
note that the two x-intercepts on the graph are located at
and
If you would like to review the solution to problem 3.1c, click on
Solution
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