Find the exact value of X

You can find the constant of proportionality by finding the ratio of

Express in the simplest form: (x^2+9x+14/x^2-49) / (3x+6/x^2+x-56)

For problems 29 - 31 the graph of a quadratic function y=ax^2 + bx + c is shown. tell whether the discriminant of ax^2 + bx + c = 0 is positive, negative, or zero.