EQUATIONS CONTAINING VARIABLES UNDER ONE OR MORE RADICALS
First make note of the fact that you cannot take the square root of a negative number. Therefore,
The answer is
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: 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
(and hence the solution) on the graph is
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Author: Nancy Marcus