Question

Use distance formula d=√(X2 – X1 )2 + (X2 – X1 )2, calculate the distance r from the origin to the point r (-2, √5).

Answer 1

`d = \sqrt{(x_(2) - x_(1))^(2) + (y_(2) - y_(1))^(2)} \\d = \sqrt{(√(5) - (-2))^(2) + (√(5) - (-2))^(2)} \\d = \sqrt{(√(5) + 2)^(2) + (√(5) + 2)^(2)} \\d = \sqrt{(4 + 4√(5) + 5) + (4v + 4√(5) + 5)} \\d = √(0 + 0) \\d = √(0) \\d = 0`