Question

Match the conjugate pairs.

• A. $-\sqrt{7}+\sqrt{2}$
• B. $\sqrt{8}+2\sqrt{2}$
• C. $\sqrt{8}-2\sqrt{2}$
• D. $\sqrt{7}+\sqrt{2}$

Answer 1

A conjugate pairs in rationalization of the numbers is formed by changing the sign between two terms in a binomial.
Like $\sqrt{7}-\sqrt{2}$ and $\sqrt{7}+\sqrt{2}$,
$\sqrt{8}-2\sqrt{2}$ and $\sqrt{8}+2\sqrt{2}$,
$-\sqrt{7}-\sqrt{2}$ and $-\sqrt{7}+\sqrt{2}$ are conjugate pairs.