x^2-4x+5=x+1
x^2-5x+4=0
x1=4
x2=1
y'=2x-4
y'(1)=-2
y'(4)=4
y(1)=1-4+5=2 y=-2x+c c=4 y=-2x+4
y(4)=16-20+5=1 1=4*4+c c=1-16=-15 y=4x-15
x^2-4x+5=x+1
x^2-5x+4=0
x1=4
x2=1
y'=2x-4
y'(1)=-2
y'(4)=4
y(1)=1-4+5=2 y=-2x+c c=4 y=-2x+4
y(4)=16-20+5=1 1=4*4+c c=1-16=-15 y=4x-15