Simplify. (4n^2−5n+6)+(2n^2−3n−4) 6n^2+2n−2
6n^2−8n+2
6n^2+8n+10
6n^4−8n^2+2

6n^2-8n+2

Step-by-step explanation:

(4n^2-5n+6)+(2n^2-3n-4)

4n^2+2n^2-5n-3n+6-4

6n^2-8n+2

just sum

10 + 10 = 20

false

step-by-step explanation:

the reason i say this is because for a certain length of sides you can pick any two and the length is wither equal or greater than the third side and in this case it's not.

3 + 5 = 8

8 is smaller than 9 which is the third side.

hope this : )