SAT Math · Nonlinear functions · hard

For the function f(x) = ((x-2)(x+3))/((x-2)(x-5)), which statement correctly describes its behavior at x=2 and x=5?

For the function f(x)=(x−2)(x+3)(x−2)(x−5)f(x) = \dfrac{(x-2)(x+3)}{(x-2)(x-5)}, which statement correctly describes its behavior at x=2x=2 and x=5x=5?

Answer and explanation

Answer: C: There is a removable discontinuity (a hole) at x=2 and a vertical asymptote at x=5.

The factor (x−2)(x - 2) appears in both the numerator and the denominator, so it cancels, leaving x+3x−5\frac{x+3}{x-5} for x≠2x \neq 2. At x=2x = 2, the original function is undefined, but the simplified form gives a finite value of −5-5, so there is a removable discontinuity (a hole). At x=5x = 5, the factor (x−5)(x - 5) remains in the denominator, so the function blows up and there is a vertical asymptote. That is choice C. Choice A treats both as asymptotes. Choice B swaps the roles. Choice D ignores that both x=2x = 2 and x=5x = 5 make the original denominator zero.

More Nonlinear functions questions

All Nonlinear functions questions

Learn the method behind questions like this one

The SAT Math course teaches each tested skill through lessons, step-by-step solutions to sample problems, the complete study guide and full-length practice tests.