Persamaan Linier dan Kuadrat
Dua Variabel
*
i) x² - y² = 9
ii) 2y = x + 3 atau x = 2y - 3 substitusi ke (i) x² - y² = 9
maka (2y - 3)² - y² = 9
2y² - 12y + 9 - y² = 9
y² -12y = 0
y(y - 12) = 0
y = 0 atau y -12 = 0
y = 0 atau y = 12
x = 2y + 3
y = 0 , x = 3
y = 12 , x = 2(12)+ 3 = 27
x1 < x2 maka x1 = 3 dan x2 = 27
(x2-x1)(y2 - y1) = (27-3)(12-0)
(x2 - x1)(y2 - y1) = (24)(12)
(x2 - x1)(y2-y1)= 288
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Persamaan Linier dan Kuadrat
Dua Variabel
*
i) x² - y² = 9
ii) 2y = x + 3 atau x = 2y - 3 substitusi ke (i) x² - y² = 9
maka (2y - 3)² - y² = 9
2y² - 12y + 9 - y² = 9
y² -12y = 0
y(y - 12) = 0
y = 0 atau y -12 = 0
y = 0 atau y = 12
*
x = 2y + 3
y = 0 , x = 3
y = 12 , x = 2(12)+ 3 = 27
x1 < x2 maka x1 = 3 dan x2 = 27
(x2-x1)(y2 - y1) = (27-3)(12-0)
(x2 - x1)(y2 - y1) = (24)(12)
(x2 - x1)(y2-y1)= 288