Explanation:
To find the sum of two polynomials, we simply add the coefficients of like terms.
The two polynomials provided are:
6s^2t - 2st^2
4s^2t - 3st^2
To find the sum, we add the coefficients of like terms:
(6s^2t + 4s^2t) - (2st^2 + 3st^2)
Combining like terms gives us:
10s^2t - 5st^2
Therefore, the sum of the two polynomials is 10s^2t - 5st^2.