Answer
x = 0
y = 2
z = -1
Work Step by Step
| 1 -2 1 |
∆ =| 0 3 2 |
| 3 -1 0 |
= 1·3·0 + (-2)·2·3 + 1·0·(-1) - 1·3·3 - 1·2·(-1) - (-2)·0·0 = 0 - 12 + 0 - 9 + 2 - 0 = -19
| -5 -2 1 |
∆1 =| 4 3 2 |
| -2 -1 0 |
= (-5)·3·0 + (-2)·2·(-2) + 1·4·(-1) - 1·3·(-2) - (-5)·2·(-1) - (-2)·4·0 = 0 + 8 - 4 + 6 - 10 - 0 = 0
| 1 -5 1 |
∆2 =| 0 4 2 |
| 3 -2 0 |
= 1·4·0 + (-5)·2·3 + 1·0·(-2) - 1·4·3 - 1·2·(-2) - (-5)·0·0 = 0 - 30 + 0 - 12 + 4 - 0 = -38
| 1 -2 -5 |
∆3 =| 0 3 4 |
| 3 -1 -2 |
= 1·3·(-2) + (-2)·4·3 + (-5)·0·(-1) - (-5)·3·3 - 1·4·(-1) - (-2)·0·(-2) = -6 - 24 + 0 + 45 + 4 - 0 = 19
x = ∆1/∆ = 0/-19 = 0
y = ∆2/∆ = -38/-19 = 2
z = ∆3/∆ = 19/-19 = -1