Tolong jawab, pake cara

• cara memfaktorkan
12 + 7x - 12x² = 0
12x² - 7x - 12 = 0
12x² - 16x + 9x - 12 = 0
4x(3x - 4) + 3(3x - 4) = 0
(4x + 3)(3x - 4) = 0

Pembuat nol :
4x + 3 = 0 ---> x1 = -3/4 ✔
3x - 4 = 0 ---> x2 = 4/3 ✔

• rumus abc
12x² - 7x - 12 = 0
a = 12
b = -7
c = -12

x1.2 = (-b ± √(b² - 4ac))/2a
x1.2 = (7 ± √(49 + 576))/24
x1.2 = (7 ± 25)/24

x1 = (7 - 25)/24 = -18/24 = -3/4 ✔
x2 = (7 + 25)/24 = 32/24 = 4/3 ✔