9 - (4C^2 - 4C + 1) = 9 - 4C^2 + 4C - 1 = - 4C^2 + 4C + 8 = 4*(C + 1)*(C - 2 ) -C^2 + C +2 D = 1 - 4*(-1)*2 = 9 ; V D = 3 X1 = ( - 1 + 3 ) : ( - 2) = 2 : ( - 2 ) = ( - 1) X2 = ( - 4 ) : ( - 2) = 2 ОТВЕТ: 4 * ( С + 1 ) * ( С - 2 )
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