Question 370623
A common student error when solving a quadratic equation is simplifying incorrectly. Consider the following INCORRECT solution: 
2+/- the square root of 7 divided by 2 
= 
1+/- square root of 7 
Explain why x= 1+-sqrt7 is the incorrect solution. 

The correct solution is 
            x= 1+-(sqrt7)/2

You need to divide the numerator by 2