Question

Sol the question sir

Answer 1

your answer is
$1(1 \times 5 - 3 \times 1) - ( - 1)(2 \times 5 - 1 \times 3) + 2(2 \times 3 - 1 \times 3) \\ (5 - 3) + (10 - 3) + (12 - 6) \\ 2 + 7 + 6 \\ 15$