How do you solve a quadratic equation using the quadratic formula; examples?

Quadratic formula gives the solutions to the equation  . the solutions are    here is an example:     we cannot use the quadratic formula until it is in  form. move 11 so that the right side can be 0. subtract 11 from both sides    to use this in the quadratic formula, we use    therefore, plug those parameters in and then tidy things up by multiplying, etc.    we are able to simplify  √104    using this simplification:     so the solutions are   

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