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=2x-4=x-2
=2x-4+2=x
=2x-2=x
=x=2
(x-2) (x-2) = x-2
x² - 2x -2x + 4 = x-2
x² + 4 = x-2
x² = x + 4 - 2
x² = x + 2
maaf kalo salah