(x - 10) (x - 2)
x² - 12x + 20
a = 1, b = -12, c = 20
a(c)= 1(20) = 20
The factors of 20 whose sum gives -12 are -2 and -10
x² - 2x -10x + 20
x(x - 2) -10 (x -2)
Hence, the factor of x² - 12x + 20 are (x - 10) (x - 2)
