x²-7x-12 faktor bentuk aljabar

x² - 7x - 12 = 0
x1.2 = (-b ± √(b² - 4ac))/2a
x1.2 = (-(-7) ± √((-7)² - 4(1)(-12))/(2.1)
x1.2 = (7 ± √(49 + 48))/2
x1 = (7 + √97)/2
x2 = (7 - √97)/2

x² - 7x - 12
= (x - (7 + √97)/2)(x - (7 - √97)/2)
= (1/4)(2x - 7 - √97)(2x - 7 + √97)