Images 2Х Х

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2х х. 4х2-2х+7=0. (Х+2)(Х-7). 2х-4=7х+2. Х2-4=0.
4х2-2х+7=0. (Х+2)(Х-7). 2х-4=7х+2. Х2-4=0.

See also