Question

a distancia entre os pontos P (-1,-1)e Q (2,3) e

Answer 1

$d_{PQ}= \sqrt{[2-(-1)]^2+[3-(-1)]^2}\\ d_{PQ}= \sqrt{(2+1)^2+(3+1)^2}\\ d_{PQ}= \sqrt{3^2+4^2}\\ d_{PQ}= \sqrt{9+16}\\ d_{PQ}= \sqrt{25}\\\\ d_{PQ}=5$