Question

What is the product of the first row , first column ?

Answer 1

9

Explanation:

[. 2×1+3×2+(-1×-1) 2×3+3×0-1×2 ]

[ -2×1+1×2+2×-1. -2×3+1×0+2×2 ]

=>

[. 9 4 ]

[. 2 -2 ]