SOLUTION: What exactly is the associative property? If possible, can you show me an example? Well to be more precise, my equation is: (x-1)(x+1)=(x+1)^2 while i was looking over how to s

Question 803488: What exactly is the associative property?
If possible, can you show me an example?
Well to be more precise, my equation is:
(x-1)(x+1)=(x+1)^2
while i was looking over how to solve this problem, they said to used the associative property.
Answer by rothauserc(4718) (Show Source): You can put this solution on YOUR website!
(x-1)(x+1)=(x+1)^2
x^2 -1 = x^2 +2x +1
note that using the associative property of addition we have
x^2 +2x +1 = x^2 +(2x +1), so
x^2 -1 = x^2 +(2x+1)
subtract x^2 from both sides of =
-1 = 2x +1
2x = -2
x = -1

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