Images 13 4Х 2

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13 4х 2. 2х2 -13х+6 0. Х2+2х=13. Х2 – 6х +13 = 0. Х2-13-2 0.
2х2 -13х+6 0. Х2+2х=13. Х2 – 6х +13 = 0. Х2-13-2 0.

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