Question

Zadanie w załączniku.

Answer 1

X-y-2=0 -y=2-x y=x-2 S(1,-2) r=p5 (x-1)^2+(y+2)^2=5 (x-1)^2+(x-2+2)^2=5 (x-1)^2+x^2=5 x^2-2x+1+x^2=5 2x^2-2x-4=0 /:2 x^2-x-2=0 x^2+x-2x-2=0 x(x+1)-2(x+1)=0 (x+1)(x-2)=0 x+1=0 v x-2=0 x=-1 v x=2 Gdy x=-1 to y=-1-2=-3 Gdy x=2 to y=2-2=0 Odp.: Punkty te to A(-1;-3) i b(2;0)