t2 sec 3 #17

To get this one, you need to remember that corresponding coefficients of equivalent polynomials are equal. In other words, if is equivalent to then you know that *a* = *m*, *b* = *n*, and *c* = *p*.

To solve this question, then, all we need to do is simplify the left hand side.

From that, we know that *a* = 6, *b* = 19, and *c* = 15. The question only asks us for *b*, so the answer is 19.