Comments

• x²+y²=2(x-y)+1 x²+y²-2x+2y-1=0 a=kx/-2=-2/-2=1 >> b=ky/-2=2/-2=-1 >> r²=a²+b² -f -> f=-1 <<~~ r²=1²+(-1)² - (-1) r²=1+1+1 r²=3 r=√3 <<~~ C(1,-1) e r=√3

  in (fei-sp) qual é o centro e o raio da circunferencia da equação x² + y² = 2(x-y)+1? Comment by michael-cooper_60c1d26852c1f June 2021