Question 31992
Well, first, you need to get you quadratic equation into the standard form {{{ax^2 + bx + c = 0}}}. So you'll need to get everything on one side of the = sign.

{{{x^2-x+56 = 17x}}} Subtract 17x from both sides of the equation.
{{{x^2 - x + 56 - 17x = 0}}} Simplify.
{{{x^2 - 18x + 56 = 0}}} Now you can factor the equation.
{{{x - 4)(x - 14) = 0}}} Apply the zero products principle if you want to solve for x.
{{{x-4 = 0}}} and/or {{{x - 14 = 0}}}
If {{{x - 4 = 0}}} then {{{x = 4}}}
If {{{x - 14 = 0}}} then {{{x = 14}}}
The roots are:
x = 4
x = 14