Question

factoring trinomials 3b2-13b+4

Answer 1

If you don't know the procedure, it is listed well here.
http://www.purplemath.com/modules/factquad.htm
there is a video tutorial also:
http://www.5min.com/Video/How-to-Use-Unfoil-to-Factor-Quadratic-Equations-181132861

Answer 2

thats quadratics not trinomials is it the same thing?

Answer 3

trinomial is a polynomial with three terms. your expression has three terms, with one term raised to the power two, so yes, it is a quadratic expression.