Answer:
The equation given above is sqrt (2x + 1) = 3. First, square both sides of the equation giving, 2x + 1 = 9. Solving for x in this equation gives an answer of x = 4. When we substitute x = 4 to the original equation, the number inside the radical sign is positive. Thus, x = 4 and it is a non-extraneous root.
Explanation:
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