What is true about the sum of the two polynomials? 6 s squared t minus 2 st squared 4 s squared t minus 3 st squared

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 “The sum is a binomial with a degree of 3.”

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