Answer:
−13x^3+2y
Step-by-step explanation:
−4x3+2y−9x3
=−4x3+2y+−9x3
=(−4x3+−9x3)+(2y)
=−13x3+2y
-13x³ + 2y
-4x³ + 2y + -9x³
-4x³ + 2y - 9x³
-4x³ - 9x³ + 2y
