Answer:
4f^2 - r^2 + 3r
Step-by-step explanation:
(4f^2 + 6r + 3) - (r^2 + 3r + 3)
Distribute
4f^2 + 6r + 3 - r^2 - 3r - 3
subtract +3 from -3
4f^2 + 6r - r^2 - 3r
combine like terms
4f^2 + 3r - r^2
rearrange terms
3f^2 + 3f
To find the opposite of f^2 + 3f +3 find the opposite of each term.
4f^2+ 6f+3-f^2-3f-3
combine 4f^2 and f^2 to get 3 f^2
