Answer:
900,000
Step-by-step explanation:
It's so easy. Don't need to explain.
27 more
k
(4x)(-3x^8)(-7x^3)
4 (-3)(-7) = 84
x(-x^8)(-x^3) = x^(1 + 8 + 3) = x^12
Answer: 84x^12