SOLUTION: a squared-4

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Question 179393: a squared-4
Found 3 solutions by nerdybill, jim_thompson5910, stanbon:
Answer by nerdybill(7384) About Me  (Show Source):
You can put this solution on YOUR website!
If they are asking you to factor then:
a^2 - 4
(a-2)(a+2)

Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
Do you want to factor? If so, then simply use the difference of squares:

a%5E2-4=%28a%29%5E2-%282%29%5E2=%28a%2B2%29%28a-2%29


So a%5E2-4=%28a%2B2%29%28a-2%29

Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
a squared-4
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a^2 -4
This is a "difference of squares" form.
It factors as (a-2)(a+20)
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Cheers,
Stan H.