How do you solve this problem x2(3x2+4x-5)

What is the vertex form of f(x) = x2 + 6x + 3

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

Ametal rod needs to be 9 feet and 5.5 inches in length. the sections of the poles being used are each 1 foot and 10.5 inches long. how many 1ft 10.5in sections would be needed to complete the 9ft 5.5in metal rod? and how many inches of material will be left?