Posted by Joel on November 03, 2002 at 23:27:30:
In Reply to: Exponents Question posted by Steve Jones on November 03, 2002 at 20:45:12:
: I understand that one evaluates an expression like (3a)^2 by distributing the exponents to each factor, my question is wheather one does the same thing when you have two terms inside the parentesis like, (3 + a)^2? This same question applies to similar variations like, (2 + a^2)^2. TIA for any input.
NO!! If there are two (or more) terms inside the parentheses, you can't just "distribute" the exponent. You have to multiply out the whole thing. To use your example:
(3 + a)^2 = (3 + a)*(3 + a) = 9 + 6a + a^2.
Post a Followup