Question 84966
Use the distance formula:
d= {{{(sqrt((x1-x2)^2 + (y1-y2)^2)))}}}

d= {{{(sqrt((2-7)^2 + (5-6)^2)))}}} [plug-in the values(2, 5) and (7,6)]
.
d= {{{(sqrt((-5)^2 + (-1)^2)))}}}
.
d= {{{(sqrt(25+1)))}}}
.
d= {{{(sqrt(26)))}}}