Разложите на множители:2у^2-18=?2х^2-12x+18=?3y-27=?3x^2+12x+12=?
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2) 2х^2-12x+18=2*(x^2-6x+9)=2*(x-3)^2
3) 3y^2-27=3*(y^2-9)=3*(y-3)*(y+3)
4) 3x^2+12x+12=3*(x^2+4x+4)=3*(x+2)^2