Distance between 2 points

Find the distance between the points (7, -9), (-1, -9)

Result

d =  8

Solution:

x0=7 y0=9  x1=1 y1=9  d=(x1x0)2+(y1y0)2=((1)7)2+((9)(9))2=8x_{0}=7 \ \\ y_{0}=-9 \ \\ \ \\ x_{1}=-1 \ \\ y_{1}=-9 \ \\ \ \\ d=\sqrt{ (x_{1}-x_{0})^2+(y_{1}-y_{0})^2 }=\sqrt{ ((-1)-7)^2+((-9)-(-9))^2 }=8



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