Question

Calcule a distância entre os pontos C(-4,0) e N(√5,-2).
A fórmula é:
D(C,N)=√(XN-XC)^2+(YN-YC)^2

Answer 1

$d_{CN}=\sqrt{(x_N-x_C)^2+(y_N-y_C)^2}\\ \\ d_{CN}=\sqrt{(\sqrt5-(-4))^2+(-2-0)^2}\\ \\ d_{CN}=\sqrt{5+8\sqrt5+16+4}=\sqrt{25+8\sqrt5}$