Answer:
17
Explanation:
Use the distance equation.
d² = (x₁−x₂)² + (y₁−y₂)²
The order doesn't matter. If I choose (x₁, y₁) to be (8, 4) and (x₂, y₂) to be (-7, -4), then:
d² = (8−(-7))² + (4−(-4))²
d² = 15² + 8²
d² = 289
d = 17
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