What number must be added to complete the square? x^2-20x=17

Pls an ice cream shop sells 5 times as many cake cones as waffle cones use variable x to represent the number of waffle the ice cream shop sells and use this variable to write an expression for the number of cake cones the ice cream shop sells. enter the expression for the number of cake cones the ice cream shop sells

If x=-3 is the only x-intercept of the graph of a quadratic equation, which statement best discribes the discriminant of the equation?

If g(x) is an odd function, which function must be an even function?