Question

What is true about the sum of the two polynomials?

6s2t – 2st2

4s2t – 3st2

A. The sum is a binomial with a degree of 2.
B. The sum is a binomial with a degree of 3.
C. The sum is a trinomial with a degree of 2.
D. The sum is a trinomial with a degree of 3.

Answer 1

Add like terms: (6s^2t − 2st^2) + (4s^2t − 3st^2) = 10s^2t − 5st^2.
There are two terms (a binomial), and each term has degree 3 (2+1 and 1+2), so the polynomial has degree 3.

Answer: B.