Answer:
I got 17n=5n]26n
I don't know what to do next but I hope it helps ^^
I don't think those two expressions would even be equal unless w = 0. You can't just add in a 2 from nowhere.
-a²-3b³+c²+2b³-c²
= -(3)² - (3×2)³ + (-3)² + (2 × 2)³ - ( -3)²
= 9 - 24 + 9 + 16 - 9
= 1
answer is 1.
