Answer:
ab + 3x²y² + 6x²y³ - 19a²b²
Step-by-step explanation:
All you do is combine like-terms:
-4a²b² - 15a²b² = -19a²b²
-3x²y² + 6x²y² = 3x²y²
Notice that ab and 6x²y³ do not have a like-term to pair up with. Moreover, if you are wondering why 3x²y² is written there instead of a 9x²y², I will show you why:
[-4a²b² + 6x²y³] - [15a²b² + 3x²y²] + ab
Polynomials are ALWAYS separated by grouping symbols. There is one more thing you should know about subtracting polynomials. Whenever you are subtracting polynomials, you just distribute the negative to avoid confusion.
I am joyous to assist you anytime.
