Question

Find the domain of the function f(x) = (x² + 2x + 1)/(x² - 8x + 12)

Answer 1

f(x) = (x² + 2x + 1)/(x² - 8x + 12) is not defined when

x² – 8+12 = 0.

∴ (x - 6)(x - 2) = 0

∴ Domain of f = R - {2, 6}