Question

find distance between a, b and minus a minus b​

Answer 1

Answer:

a,b=-a,-b

a-a=0

b-b=0

Answer 2

x1=a, y1=b, x2=-a and y2=-b

Using distance formula

$distance = \sqrt{(x2 - x1) ^{2} + (y2 - y1) ^{2} } \\ \: \: \: = \sqrt{ (- a - a)^{2} + ( - b - b)^{2} } \\ \: \: \: = \sqrt{( -2 a) ^{2} + ( - 2b)^{2} } \\ \: \: \: = \sqrt{4 {a}^{2} + 4 {b}^{2} } \\ \: \: \: \: = \sqrt{4( {a}^{2} + b ^{2}) } \\ \: \: \: \: = 2 \sqrt{ {a}^{2} + {b}^{2} }$