2 dan 3. mohon bantuannya

2][
Perhatikan kesamaan tempat nya

A + B - C
3 + x - (-3) = 8
6 + x = 8
x = 2 ✔

5 + (-3) - y = -x
2 - y = -2
y = 4 ✔

Maka,
x + 2xy + y = 2 + 2.2.4 + 4 = 22 ✔

3][
Det A = Det B
3x . x - 5 . 2x = 3 . 5 - 2x . x
3x² - 10x = 15 - 2x²
5x² - 10x - 15 = 0
x² - 2x - 3 = 0
(x - 3)(x + 1) = 0
x = 3 atau x = -1