Answers

2014-05-07T20:19:33+08:00
Isolate the radical expression involving the variable. If more than one radical expression involves the variable, then isolate one of them.Raise both sides of the equation to the index of the radical.If there is still a radical equation, repeat steps 1 and 2; otherwise, solve the resulting equation and check the answer in the original equation.Here is an example:

Solve .Isolate the radical expression. 

Now apply quadratic formula:

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2014-05-07T22:47:23+08:00
Example
1.
  \sqrt{5x} =10
 (\sqrt{5x} )^{2} =  10^{2}
5x=100
 \frac{5x}{5} =  \frac{100}{5}
x=20
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