Question

Choose correct alternative for the following question.

To solve x + y = 3; 3x – 2y – 4 = 0 by determinant method find D.

Options

• 5

• 1

• −5

• −1

Answer 1

x + y = 3
3x – 2y – 4 = 0
∴ 3x – 2y = 4

`"D" = |(1, 1), (3, -2)| = 1 × (-2) –  1 × 3 = –  2 –  3 = –  5`

Hence, the correct answer is option −5.