Faktor dari x pangkat 2 kurang 12 x pangkat 2 tambah 35

x² - 12x + 35 = 0
a. Pemfaktoran biasa
➡(x - 5) × (x - 7) = 0
▶ x - 7 = 0
x1 = 7
▶ x - 5 = 0
x2 = 5

b. Rumus abc
➡a = 1
b = -12
c = 35
➡(-b ± ✓b² - 4ac) ÷ 2a
= (-(-12) ± ✓-12² - 4 × 1 × 35) ÷ 2 × 1
= (12 ± ✓144 - 140) ÷ 2
= (12 ± ✓4) ÷ 2
= (12 ± 2) ÷ 2
➡ x1 = (12 + 2) ÷ 2
= 14 ÷ 2
= 7
x2 = (12 - 2) ÷ 2
= 10 ÷ 2
= 5