Multiplying, Dividing, and Rationalizing Radicals

9. Roots and Radicals / Multiplying, Dividing, and Rationalizing Radicals / Problem 2

Problem 2

Which pair in the list below are like terms?

$7 the square root of 2$ and $- 3 \sqrt{2}$

$2$ and $2 the square root of 2$

$5 the square root of 2$ and $5$

$the square root of 2$ and $the square root of 22$