If 6-2=4, than r=4. It is the simple process of knowing your facts.
Answer:
-4y^3 + 4y^2 -6y + 25
Step-by-step explanation:
Combine like terms:
(-4y^3-5y+16)
+ (4y^2 - y +9)
----------------------------
-4y^3 + 4y^2 -6y + 25
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You multiply the 3 by -6 then multiply the 3 by 6 , one you get -18 and the other you 18x you change the -18 into a positive then add it by 18 in get 36 then you divide by 18x in get 2