SOLUTION: Perform the indicated operations and simplify 1. (3a-b)(3a+b)-(2a-2b)^ 2. (4x-y)^

Question 260338: Perform the indicated operations and simplify
1. (3a-b)(3a+b)-(2a-2b)^
2. (4x-y)^
Answer by drk(1908) (Show Source): You can put this solution on YOUR website!
Perform the indicated operations and simplify
1. (3a-b)(3a+b)-(2a-2b)^
there was no power. Suppose it is a 2. WE then get
(3a-b)(3a+b)-(2a-2b)^2
step 1 - foil the first two terms to get
(9a^2-b^2) - (2a-b)^2
step 2 foil the binomial to get
(9a^2-b^2) - (4a^2-2ab+b^2)
step 3 - combine like terms to get
5a^2 + 2ab - 2b^2
--
2. (4x-y)^
there is no power here, suppose it is a 2.
(4x-y)^2
becomes
16x^2 - 8xy + y^2
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