3x(3x minus 2)+7ravno 6
3x( 3x - 2 ) + 7 = 6 9x^2 - 6x + 1 = 0 D = 36 - 36 = 0 X = 6 : 18 = 1/3 Ответ 1/3
spasiba
3х(3х-2)+7=6 9х²-6х+7-6=0 9х²-6х+1=0 Дискрименант =0