SOLUTION: -2 and +2 are equal, if yes how ? we have tried this- (-2)x(-2)= 2x2 => (-2)^2=2^2 => (-2)=2 Is it correct ?

Question 1113462: -2 and +2 are equal, if yes how ?
we have tried this-
(-2)x(-2)= 2x2
=> (-2)^2=2^2
=> (-2)=2
Is it correct ?
Found 3 solutions by math_helper, Alan3354, ikleyn:
Answer by math_helper(2461)   (Show Source): You can put this solution on YOUR website!
(-2)x(-2)= 2x2
=> (-2)^2=2^2
=> (-2)=2
Is it correct ?
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In a way, it good that you are having trouble because !
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Answer by Alan3354(69443)   (Show Source): You can put this solution on YOUR website!
-2 is not equal to 2.
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Squaring and then taking the square root can introduce extraneous "solutions."

Answer by ikleyn(52777)   (Show Source): You can put this solution on YOUR website!
.

The fact that = DOES NOT IMPLIES that x = y. Example: = , but -2 =/= 2.

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