X^2-7x+12=0 помогите пожалуйста!!!
X^2 - 7x + 12 = 0 D = 49 - 4*12 = 1 x1 = ( 7 + 1)/2 = 8/2 = 4; x2 = ( 7 - 1)/2 = 6/2 = 3
Х²-7х+12=0 х1,2=7/2+/-√49/4-12=7/2+/-√(49-48)/4=7/2+/-√1/4=7/2+/-1/2 х1=7/2+1/2=4 х2=7/2-1/2=3