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x²+2x-2x-4 > x²-4x+4-4
4x > 4
x > 1
x2-x2+4x > 4+4-4
4x > 4 / :4
x>1
Te 2 przy x to kwadraty.
x²-4>x²-4x+4-4
x²-x²+4x>4-4+4
4x>4 /:4
x>1