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.
common guppies: 3.2x^2+5x+0.2
Endler's guppies: 4.2x^2-5.1x+1
what polynomial models the total number of common and Endler's guppies
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