Section Warm-Up
How do we know if a given value is the solution to a radical equation? If the first thing you think of is to test the value, you are absolutely correct. For example, given the equation and a possible solution of x = 4, check to see if the solution is correct.
We will substitute x = 4 into our equation.
By working through the substitution process we find that x = 4 is a solution to the equation .