Practice questions
Answers and explanations
- The correct answer is Choice (D).
First evaluate the expression inside the square root symbol by filling in the value of x:
Find
by determining that
- The correct answer is Choice (C).
Both radicals are cube roots, so multiply the radicands. Because
you get
Factor and simplify, and look for perfect cubes to make it easier:
Rewrite the numbers and variables as the product of radicals so you continue to work with like terms:
Solve what you can and simplify: