2x^2-24x+54=0 3x^2+24x-27=0
1) 2x^2-24x+54=0 x^2-12x+27=0 Виет x+x'=12 x×x'=27 x=9 x'=3 2) 3x^2+24x-27=0 x^2+8x-9=0 Виет x+x'=-8 x×x'=-9 x=-9 x'=1