Examples

Find the Inverse of the Resulting Matrix
Step 1
Add the corresponding elements.
Step 2
Simplify each element.
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Step 2.1
Subtract from .
Step 2.2
Add and .
Step 2.3
Add and .
Step 2.4
Add and .
Step 3
The inverse of a matrix can be found using the formula where is the determinant.
Step 4
Find the determinant.
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Step 4.1
The determinant of a matrix can be found using the formula .
Step 4.2
Simplify the determinant.
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Step 4.2.1
Simplify each term.
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Step 4.2.1.1
Multiply by .
Step 4.2.1.2
Multiply .
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Step 4.2.1.2.1
Multiply by .
Step 4.2.1.2.2
Multiply by .
Step 4.2.2
Add and .
Step 5
Since the determinant is non-zero, the inverse exists.
Step 6
Substitute the known values into the formula for the inverse.
Step 7
Multiply by each element of the matrix.
Step 8
Simplify each element in the matrix.
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Step 8.1
Cancel the common factor of .
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Step 8.1.1
Factor out of .
Step 8.1.2
Factor out of .
Step 8.1.3
Cancel the common factor.
Step 8.1.4
Rewrite the expression.
Step 8.2
Combine and .
Step 8.3
Move the negative in front of the fraction.
Step 8.4
Multiply by .
Step 8.5
Cancel the common factor of .
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Step 8.5.1
Factor out of .
Step 8.5.2
Cancel the common factor.
Step 8.5.3
Rewrite the expression.
Step 8.6
Cancel the common factor of .
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Step 8.6.1
Factor out of .
Step 8.6.2
Factor out of .
Step 8.6.3
Cancel the common factor.
Step 8.6.4
Rewrite the expression.
Step 8.7
Combine and .
Step 8.8
Move the negative in front of the fraction.
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