Respostas

2014-01-23T14:28:19-02:00
P(1,-3)=x²+y²-2x+4y+k=0
em que x=1
e y=-3
P(1,-3)=1²+3²-2.1+4.(-3)+k=0
P(1,-3)=1+9-2-12+k=0
P(1.-3)=-4=-K
K=4
1 2 1