≡ We know that:
⇔ [tex](x_{1},y_{1})[/tex] → [tex](-4,-5)[/tex]
⇔ [tex](x_{2},y_{2})[/tex] → [tex](3,-1)[/tex]
≡ Solution:
⇒ [tex]\sqrt{[(x_{2}-x_{1})^{2}+(y_{2}-y_{1})^{2}]} [/tex]
⇒ [tex]\sqrt{[(3-(-4))^{2}+(-1-(-5))^{2}]} [/tex]
⇒ [tex]\sqrt{[7^{2}+4^{2}]} [/tex]
⇒ [tex]\sqrt{[49+16]} [/tex]
⇒ [tex]\boxed{\sqrt{65}}[/tex]
