Question

5a²-4a²化简

-4a²-[5a-8a²-3(2a²-a)+9a²]求化简
-4a²-[5a-8a²-3(2a²-a)+9a²]
写出化简的过程

Answer 1

原式=-4a²-(5a-8a²-6a²+3a+9a²)
=-4a²-(8a-5a²)
=-4a²-8a+5a²
=a²-8a