AP TET Paper 2 Math and Science Model Paper 4

Concept:A trinomial is a polynomial that contains exactly three terms.Explanation:Count the number of terms in each option.Option A: $\frac{7}{5}p^{2}q^{5}r^{3}$ has only $1$ term, so it is not a trinomial.Option B: $p^{2}q^{5}r^{3} + p^{7}q^{5}r^{3} - p^{2}q^{3}r^{2} + p^{2}q^{2}r^{3}$ has $4$ terms, so it is not a trinomial.Option C: $9x^{2} + yz^{2}q^{5}r^{3}$ has $2$ terms, so it is not a trinomial.Option D: $x^{2}y + 9x^{2} + 5yz^{2}$ has exactly $3$ terms, so it is a trinomial.Answer:Option D is the correct answer.