Distance between points (-2, -1) and (1, 2)

Given Coordinates: x₁ = -2  y₁ = -1,  x₂ = 1  y₂ = 2
Distance Formula: d = √(x₂ − x₁)² + (y₂ − y₁)²
Substitute the given coordinates into the Distance Formula and Simplify:
d = √(1 − (-2))² + (2 − (-1))²
d = √(1 + 2)² + (2 + 1)²
d = √3² + 3²
d = √9 + 9
d = √18
d = √9 * 2
d = √9 * √2
d = 3√2
Therefore, the distance between the points (-2, -1) and (1, 2) is equal to 3√2
Note: As a decimal number, 3√2 ≈ 4.2426406871193