Find the determinant of the matrix with rows (4, 1) and (3, 2).
Answer and explanation
Correct answer: A. 5
- Step 1: For rows (a, b) and (c, d) the determinant is ad - bc.
- Step 2: det = 4 x 2 - 1 x 3 = 5.
Answer
5.
Why not the others: '11' adds the cross products instead of subtracting; '-5' subtracts in the wrong order; '-2' multiplies along rows instead of diagonals.
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