(5x^4-3x^3+2)-(-3x^4+2x^2-5)

Here's the solution :

8-3-2+7

Step-by-step explanation:

The first thing to do in this problem is distribute the negative in front of (). This makes it .

From here you can remove the parenthesis and combine like terms. 5 combines with 3 to get 8 and 2 and 5 combine to get 7. The -3 and -2 cannot combine with anything since they don't share any like terms.

Using the combinations, bring all of the terms back together and you get 8-3-2+7

18

step-by-step explanation:

draw the shape and you will see that f and k are actually at adjacent vertices (points of the hexagon that are neighboring).   so find the distance between (1,2) and (4,2).   that is easy since (1,2) and (4,2) is just a vertical distance to count, which is 3.   it is a regular polygon which means all sides are congruent.   you have 6 sides (hexa) so multiply 6 by 3 to receive 18.