What is true about the sum of the two polynomials?6s2t – 2st24s2t – 3st2

Add the like terms: 6s²t + 4s²t = 10s²t, and −2st² + (−3st²) = −5st². The sum is 10s²t − 5st², which has two terms, so it is a binomial. Each term has total degree 3, so the correct choice is a binomial with a degree of 3.

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