х(13-х) -22=0 13х - х^2-22=0 -x^2+13x -22=0 x^2-13x +22=0
D = 169 - 4*22*1= 81 x1 = (13+9)/2 = 11
x2 = (13-9)/2 = 2
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х(13-х) -22=0 13х - х^2-22=0 -x^2+13x -22=0 x^2-13x +22=0
D = 169 - 4*22*1= 81 x1 = (13+9)/2 = 11
x2 = (13-9)/2 = 2