What is the determinant of the matrix with rows (3, 4) and (-1, -2)?
Answer and explanation
Correct answer: D. -2
- Step 1: For a 2x2 matrix [[a, b], [c, d]] the determinant is ad - bc.
- Step 2: (3)(-2) - (4)(-1) = -2.
Answer
-2.
Why not the others: The determinant subtracts the product of the off-diagonal entries from the product of the diagonal entries.
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