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43 votes
43 votes
Simplify the sum. (8u^3+8u^2+6)+(4u^3-6u+3)​

User Onimusha
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1 Answer

13 votes
13 votes

Answer:


\boxed{12u^3+8u^2-6u+9}

Explanation:


(8u^3+8u^2+6)+(4u^3-6u+3) = 8u^3+8u^2+6+4u^3-6u+3

Once


8x+4x = 12x, \text{ as } x = u^3


8u^3+8u^2+6+4u^3-6u+3 = 12u^3+8u^2+6-6u+3 = \boxed{12u^3+8u^2-6u+9}

You don't need to factor.

User Thibaud Ledent
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2.7k points