Question

Find the value of the determinant. 3 and -3 and -5 and -6

Answer 1

Explanation:

I think your determinant is

3 -3

-5 -6

To evaluate this, multiply diagonally: (3)(-6) = -18, followed by -(5)(-6), or 30.

The value of the determinant is then 30 - 18, or 12.

Review: if you multiply DOWN, as we did with (3) and (-6), we give the product the + sign: +(3)(-6) = -18;

if you multiply UP, as we did with (5)(-6), we give the product the negative sign: -(5)(-6) = +30

I urge you to read the rules on evaluating determinants.