Matrices

Decide whether the matrix [[-3, -4], [4, -3]] is invertible.

• not invertible
• invertible
• invertible only if trace is zero
• not enough information

Decide whether the matrix [[6, -2], [6, -4]] is invertible.

• not invertible
• invertible only if trace is zero
• not enough information
• invertible

Find the determinant of the matrix [[0, -3], [-3, 5]].

• 5
• 9
• -9

Decide whether the matrix [[6, 5], [0, 6]] is invertible.

• invertible
• not invertible
• invertible only if trace is zero
• not enough information

Decide whether the matrix [[0, 0], [-5, 4]] is invertible.

• invertible only if trace is zero
• invertible
• not invertible
• not enough information

Find the determinant of the matrix [[-1, 3], [6, 6]].

• 24
• -24
• 5
• 12