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Simplifying
x2 + -4x + 4x = 1
Reorder the terms:
-4x + 4x + x2 = 1
Combine like terms: -4x + 4x = 0
0 + x2 = 1
x2 = 1
Solving
x2 = 1
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Simplifying
x2 = 1
Take the square root of each side:
x = {-1, 1}
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