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Solve for x: sqrt(x^2) = 6
Raise both sides to the power of two: x^2 = 36
Take the square root of both sides: x = 6 or x = -6
√[4x^2] - √x^2 = 6
We can write this in the following manner
l 2x l - l x l = 6
2 l x l - ; x l = 6
l x l = 6
This is true when x = 6 or x = - 6
