Question

Determine a distância entre os pontos A(-5,4),B(7,-8).

Answer 1

d(A, B) = [(7 - (- 5))^2 + (- 8 - 4)^2]^(1/2)
d(A, B) = [(7 + 5)^2 + (- 12)^2]^(1/2)
d(A, B) = [144 + 144]^(1/2)
d(A, B) = [288]^(1/2)
d(A, B) = 12*[2]^(1/2)