Question

xsxsxsxsxsxsxxsx

Answer 1

6.5=0.005x^2 + .45x -6.5
now solve for x
0.005x^2 +.45x-6.5+(-6.5)
0.005x^2 +.45x-13
then factor out

Answer 2

here is one method of factoring quadratic equations (what was provided in the word problem and highschoolmom2010's reply)

http://www.youtube.com/watch?v=WipeiPxKTCI
http://www.purplemath.com/modules/factquad3.htm

this is the best i have due to being new at algebra myself :)

Answer 3

i highly recommend khan academy for all of your math requirements :)

https://www.khanacademy.org/math/trigonometry/polynomial_and_rational/quad_factoring/v/factoring-quadratic-expressions