Page 13 - Laras ayu lestari _ 212010084_ ppt sistem persamaan linear
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7. | xy |=| x | × | y |
Misalnya, x = 3 dan y = -4.
| (3)(-4) | = | 3 | × | -4 |
| -12 | = | 3 | × | -4 |
12 = 3 × 4
12 = 12.
8. | x/y | = | x | / | y |; dengan syarat y ≠ 0
Misalnya x = -2 dan y = 3.
| -2/3 | = | -2 | / | 3 |
2/3 = 2 / 3
9. | x - y | = | x | - | y |
Misalnya x = 2 dan y = 3.
| 2 - 3 | = | 2 | - | 3 |
10. | x + y | = | x | + | y |
Misalnya x = 3 dan y = 4.
| 3 + 4 | = | 3 | + | 4 |
7 = 3 + 4
7 = 7
