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Precalculus Examples
Step 1
Add to both sides of the equation.
Step 2
Rewrite as exponentiation.
Step 3
Substitute for .
Step 4
Rewrite the expression using the negative exponent rule .
Step 5
Step 5.1
Find the LCD of the terms in the equation.
Step 5.1.1
Finding the LCD of a list of values is the same as finding the LCM of the denominators of those values.
Step 5.1.2
The LCM of one and any expression is the expression.
Step 5.2
Multiply each term in by to eliminate the fractions.
Step 5.2.1
Multiply each term in by .
Step 5.2.2
Simplify the left side.
Step 5.2.2.1
Simplify each term.
Step 5.2.2.1.1
Multiply by by adding the exponents.
Step 5.2.2.1.1.1
Move .
Step 5.2.2.1.1.2
Multiply by .
Step 5.2.2.1.2
Cancel the common factor of .
Step 5.2.2.1.2.1
Cancel the common factor.
Step 5.2.2.1.2.2
Rewrite the expression.
Step 5.3
Solve the equation.
Step 5.3.1
Subtract from both sides of the equation.
Step 5.3.2
Use the quadratic formula to find the solutions.
Step 5.3.3
Substitute the values , , and into the quadratic formula and solve for .
Step 5.3.4
Simplify.
Step 5.3.4.1
Simplify the numerator.
Step 5.3.4.1.1
Raise to the power of .
Step 5.3.4.1.2
Multiply .
Step 5.3.4.1.2.1
Multiply by .
Step 5.3.4.1.2.2
Multiply by .
Step 5.3.4.1.3
Subtract from .
Step 5.3.4.1.4
Rewrite as .
Step 5.3.4.1.4.1
Factor out of .
Step 5.3.4.1.4.2
Rewrite as .
Step 5.3.4.1.5
Pull terms out from under the radical.
Step 5.3.4.2
Multiply by .
Step 5.3.4.3
Simplify .
Step 5.3.5
The final answer is the combination of both solutions.
Step 6
Substitute for in .
Step 7
Step 7.1
Rewrite the equation as .
Step 7.2
Take the natural logarithm of both sides of the equation to remove the variable from the exponent.
Step 7.3
Expand the left side.
Step 7.3.1
Expand by moving outside the logarithm.
Step 7.3.2
The natural logarithm of is .
Step 7.3.3
Multiply by .
Step 8
Substitute for in .
Step 9
Step 9.1
Rewrite the equation as .
Step 9.2
Take the natural logarithm of both sides of the equation to remove the variable from the exponent.
Step 9.3
Expand the left side.
Step 9.3.1
Expand by moving outside the logarithm.
Step 9.3.2
The natural logarithm of is .
Step 9.3.3
Multiply by .
Step 10
List the solutions that makes the equation true.
Step 11
The result can be shown in multiple forms.
Exact Form:
Decimal Form: