How do you reduce improper fractions?

Find the greatest common factor of the followig monomials 21u^5v,3u^4v^6, and 3u^2v^5

Can some one me with these questions

For the quadratic function [tex]y=(x+4)^2-1[/tex] , do the following: a) rewrite the function in the standard form, b) rewrite the function in intercept form, c) find the vertex, d) find the y-intercept, e) find the x-intercepts.