mohon bantuannya guys

Matriks

Jawaban ada di gambar

Rumus:

A =
(a b)
(c d)

A⁻¹ =
{1/(det A)} ×
(d -b)
(-c a)
A⁻¹ =
{1/(ad - bc)} ×
(d -b)
(-c a)

Penyelesaian:

M =
(-2 3)
(2 -4)

M⁻¹ =
{1/(det M)} ×
(-4 -3)
(-2 -2)
M⁻¹ =
{1/((-4)(-2) - (-3)(-2))} ×
(-4 -3)
(-2 -2)
M⁻¹=
{1/(2)} ×
(-4 -3)
(-2 -2)
M⁻¹ =
(-4/2 -3/2)
(-2/2 -2/2)
M⁻¹ =
(-2 -3/2)
(-1 -1)

Jawaban: A.