9x(в квадрате)-3=9-12x
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9x^2-3=9-12x 9x^2+12x-12=0 9x^2+12x-12=0 /3 3x^2+4x-4=0 D=16+4*3*4=16+48=64=8 x1=4+8/6=2 x2=4-8/6=-2/3