Questions on Algebra: Distributive, associative, commutative properties, FOIL answered by real tutors!

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Question 147942This question is from textbook PRENTICE HALL ALGEBRA 1
: 3a3 +2 for a=1This question is from textbook PRENTICE HALL ALGEBRA 1
: 3a3 +2 for a=1
Answer by mangopeeler07(445) About Me  (Show Source):
You can put this solution on YOUR website!
3a^3+2 = 3(a^3)+2. So if a=1, plug a in and get 3(1^3)+2 or 3+2. so if a=1, then 3a^3+2=5. Just remember, 3a^3 is 3(a^3) and not (3a)^3. That would be 27a^3. So if there are no parentheses, then cube the variable first, and then multiply it by the coefficient.