To simplify as

MATHEMATICS · Single correct · AP · Calculus AB · Limits and Continuity · Limits and Continuity

Problem

To simplify

\displaystyle \frac{\sqrt{x}-\sqrt{5}}{x-5}

x \to 5

, which of the following expressions should be multiplied to both numerator and denominator? (a)

\sqrt{x}-\sqrt{5}

(b)

\sqrt{x}+\sqrt{5}

(c)

x+5

(d)

\sqrt{x}\sqrt{5}