Question

√x-1 = (1-x) задание2 √x-4 =(4-x)

Answer 1

√x-1=(1-x) () ² x-1=1-2x+x² x²-3x+2=0 D=9-8=√1=1 x1=(3+1)/2=2 x2=(3-1)/2=1 √x-4=(4-x) ()² x-4=16-8x+x² x²-9x+20=0 D=81-80=√1=1 x1=(9+1)/2=5 x2=(9-1)/2=4 Вроде так