3. Write the polynomial in standard form. Then name the polynomial based on it's degree and number of terms.
6 - 12x + 13x^2 - 4x^2
A. 9x^2 - 12x; quadratic binomial.
B. 9x^2 - 12x + 6; quadratic trinomial.***
C. -3x^2 + 6; quadratic binomial.
D. 9x^2 - 12x - 6; cubic trinomial.
4. A biologist studied the populations of common guppies and Endler's guppies over a 6-year period. The biologist modeled the populations, in tens of thousands, with the following polynomials where x is time, in years.