Quadratic Equations by Using Square roots question
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Quadratic Equations by Using Square roots question

[From: ] [author: ] [Date: 11-05-14] [Hit: ]
then x can equal either +sqrt(a) or -sqrt(a), because any number squared is positive, and therefore there are two solutions.If x^2 = 4, then x = both +2 or -2. It works because of what I stated above,......
If x^2= a and a is a positive real number, then x=_______ or x= _______

Also. X^2=4

X=+/-_____

The solutions are ____ and ____.

I just need help with these two to understand it better. Thanks.

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If x^2 = a, then x can equal either +sqrt(a) or -sqrt(a), because any number squared is positive, and therefore there are two solutions.

If x^2 = 4, then x = both +2 or -2. It works because of what I stated above, plug it in to see why.

The general concept of squaring a number is that no matter the number squared, the outcome is positive, and because for every number there is a negative equivalent (except zero, obviously), you must consider both when answering the question.
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