SOLUTION: x^2-1=8 solve using square roots

Question 451671: x^2-1=8 solve using square roots
Answer by pedjajov(51) (Show Source): You can put this solution on YOUR website!
This can be written as

, this is now difference of two squared numbers, x and 3
, this is product of sum and differnce x and 3

So it can be

-> x=-3
-> x= 3

We say roots of this quadratic equation are 3 and -3.
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