7x^2-8x+1=0 решите уравнение
Д=(-8)^2 - 4*7*1=64 - 28=36 X1=8+6/7*2=14/14=1 X2=8-6/7*2=2/14=1/7
7х^2 - 8х +1 =0
Д = 64-4 * 7 * 1 = 64-28 = 36 =6
х1= 8+6 \ 14 = 14\14 = 1
х2 = 8-6 \ 14 = 2\14 = 1\7