Chapter 10 - Radical Functions and Equations - 10.3 - Solving Radical Equations - Communicate Your Answer - Page 559: 3

See the explanation

We can solve such equations by isolating the square root on one side, then by raising both sides to the power of $2$. In this way, the square root will disappear and the equation will be simply solved. But we should be careful. After squaring both sides. extraneous solutions may be obtained and we should check the final answers.