Precalculus Examples
[-20-5-4]-[-4022]
Step 1
Subtract the corresponding elements.
[-2+40-0-5-2-4-2]
Step 2
Step 2.1
Add -2 and 4.
[20-0-5-2-4-2]
Step 2.2
Subtract 0 from 0.
[20-5-2-4-2]
Step 2.3
Subtract 2 from -5.
[20-7-4-2]
Step 2.4
Subtract 2 from -4.
[20-7-6]
[20-7-6]
Step 3
The determinant of a 2×2 matrix can be found using the formula |abcd|=ad-cb.
2⋅-6-(-7⋅0)
Step 4
Step 4.1
Simplify each term.
Step 4.1.1
Multiply 2 by -6.
-12-(-7⋅0)
Step 4.1.2
Multiply -(-7⋅0).
Step 4.1.2.1
Multiply -7 by 0.
-12-0
Step 4.1.2.2
Multiply -1 by 0.
-12+0
-12+0
-12+0
Step 4.2
Add -12 and 0.
-12
-12