Question

Find the distance between the points given. (-3, 2) and (9, -3)

Answer 1

The distance will be given by the equation;
D=$\sqrt{( x_{1} - x_{2} )^{2} +( y_{1} - y_{2} )^{2} }$
D=$\sqrt{ (-3-9)^{2}+( 2--3)^{2} }$
D=$\sqrt{ (-12)^{2} + (5)^{2} }$
D=$\sqrt{169}$
D=13 units