Rozwiąż metodą wyznacznikową następujący układ równań:
x² - 6x + 9 - x² + 25 = 2y + 48
2(x + y) - (x - y) = 3
-6x + 34 = 2y + 48
2x + 2y - x + y = 3
-6x - 2y = 14
x + 3y = 3
W = | -6 -2 |
| 1 3 | = -18 + 2 = -16
Wx = | 14 -2 |
| 3 3 | = 42 + 6 = 48
Wy = | -6 14 |
| 1 3| = -18 - 14 = -32
x = Wx / W = 48 / -16 = -3
y = Wy / W = -32 / -16 = 2
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x² - 6x + 9 - x² + 25 = 2y + 48
2(x + y) - (x - y) = 3
-6x + 34 = 2y + 48
2x + 2y - x + y = 3
-6x - 2y = 14
x + 3y = 3
W = | -6 -2 |
| 1 3 | = -18 + 2 = -16
Wx = | 14 -2 |
| 3 3 | = 42 + 6 = 48
Wy = | -6 14 |
| 1 3| = -18 - 14 = -32
x = Wx / W = 48 / -16 = -3
y = Wy / W = -32 / -16 = 2