Question 529779
Let's rewrite this expression by distributing the negative into that second quantity. In other words...

(u-4) - (6+3u^2-4u) can be rewritten as:

(u-4) + -1*[6+3u^2-4u]

u-4 -6 -3u^2 + 4u

Now simplify by combining like terms.

-3u^2 +4u + u -6 -4 
-3u^2 +5u -10 <---- Answer


Hope this helped!