Answer:
[tex]-19x^2y[/tex] and [tex]11x^2y[/tex] are like terms.
Step-by-step explanation:
Recall what "like terms" means in an algebraic expression: Those terms that have the same variables at exactly the same exponents.
so in the expression: [tex]-2x^3-19x^2y-15xy+11x^2y[/tex] the second term and the fourth one are like terms. Notice that both terms have the variables: [tex]x^2y[/tex] with the variable "x" to the power 2, and with the variable y to the first power.
[tex]-19x^2y[/tex] and [tex]11x^2y[/tex] are like terms.
Therefore, those are the only terms you can combine to reduce the expression.