Question

a equacao da circuferencia de equacao x2+y2-4x-8y+19=0é

Answer 1

${x}^{2} - 4 {x}^{2} = 360 \\ x - 4 {x}^{2} = 360 \\ 3 {x}^{2} = 360 \\ {x}^{2} = 360 \div 3 \\ {x}^{2} = 120 \\ x = 120 \div 2 \\ x = 60$


Y²+19=360
y²=360-19
Y²=341
Y=341/2
Y170,5