Basic Math Examples

Solve for m 3/(16m^2-81)=-5/(4m^2+9m)
Step 1
Factor each term.
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Step 1.1
Rewrite as .
Step 1.2
Rewrite as .
Step 1.3
Since both terms are perfect squares, factor using the difference of squares formula, where and .
Step 1.4
Factor out of .
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Step 1.4.1
Factor out of .
Step 1.4.2
Factor out of .
Step 1.4.3
Factor out of .
Step 2
Find the LCD of the terms in the equation.
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Step 2.1
Finding the LCD of a list of values is the same as finding the LCM of the denominators of those values.
Step 2.2
Since contains both numbers and variables, there are four steps to find the LCM. Find LCM for the numeric, variable, and compound variable parts. Then, multiply them all together.
Steps to find the LCM for are:
1. Find the LCM for the numeric part .
2. Find the LCM for the variable part .
3. Find the LCM for the compound variable part .
4. Multiply each LCM together.
Step 2.3
The LCM is the smallest positive number that all of the numbers divide into evenly.
1. List the prime factors of each number.
2. Multiply each factor the greatest number of times it occurs in either number.
Step 2.4
The number is not a prime number because it only has one positive factor, which is itself.
Not prime
Step 2.5
The LCM of is the result of multiplying all prime factors the greatest number of times they occur in either number.
Step 2.6
The factor for is itself.
occurs time.
Step 2.7
The LCM of is the result of multiplying all prime factors the greatest number of times they occur in either term.
Step 2.8
The factor for is itself.
occurs time.
Step 2.9
The factor for is itself.
occurs time.
Step 2.10
The factor for is itself.
occurs time.
Step 2.11
The LCM of is the result of multiplying all factors the greatest number of times they occur in either term.
Step 2.12
The Least Common Multiple of some numbers is the smallest number that the numbers are factors of.
Step 3
Multiply each term in by to eliminate the fractions.
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Step 3.1
Multiply each term in by .
Step 3.2
Simplify the left side.
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Step 3.2.1
Cancel the common factor of .
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Step 3.2.1.1
Factor out of .
Step 3.2.1.2
Cancel the common factor.
Step 3.2.1.3
Rewrite the expression.
Step 3.3
Simplify the right side.
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Step 3.3.1
Cancel the common factor of .
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Step 3.3.1.1
Move the leading negative in into the numerator.
Step 3.3.1.2
Cancel the common factor.
Step 3.3.1.3
Rewrite the expression.
Step 3.3.2
Apply the distributive property.
Step 3.3.3
Multiply.
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Step 3.3.3.1
Multiply by .
Step 3.3.3.2
Multiply by .
Step 4
Solve the equation.
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Step 4.1
Move all terms containing to the left side of the equation.
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Step 4.1.1
Add to both sides of the equation.
Step 4.1.2
Add and .
Step 4.2
Divide each term in by and simplify.
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Step 4.2.1
Divide each term in by .
Step 4.2.2
Simplify the left side.
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Step 4.2.2.1
Cancel the common factor of .
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Step 4.2.2.1.1
Cancel the common factor.
Step 4.2.2.1.2
Divide by .
Step 5
The result can be shown in multiple forms.
Exact Form:
Decimal Form:
Mixed Number Form: