EQUATIONS CONTAINING VARIABLES UNDER ONE OR MORE RADICALS
Since the index of the radical is even, the quantity under the
radical cannot be negative and
Check the solution by substituting in the original equation
for x. If the left side of the equation equals the right side of the equation
after the substitution, you have found the correct answer.
Right side: Since the left side of the original equation equals the right side of the
original equation when you substitute , the answer is correct.
You can also check the answer by graphing
(the left side of the original equation minus the right side of the
original equation). The solution will be the x-intercept. The x-intercept
If you would like to review the solution to problem 2.2b,click on problem
Links to S221102
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