Question

What is A−1?

Enter your answer by filling in the boxes. Enter any fractions as simplified fractions.

Answer 1

-1/2 -1/8

1/4 3/16

Explanation:

Answer 2

(-1/2 -1/8

1/4 3/16)

Explanation:

(-3 -2

4 8 ) ^ -1

First find the determinant

-3 * 8 - (-2 *4) = -24 - (-8) = -24 +8 = -16

Multiply 1 over the determinant by The matrix with the -3 and 8 switched

and negate the -2 and the 4

1/-16(8 2

-4 -3 )

(-1/2 -1/8

1/4 3/16)