d=√[(x₂-x₁)²+(y₂-y₁)]²
d=√[(-1-3)²+(1-4)²]
d=√(16+9)
d=√25
d=5
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d=√[(x₂-x₁)²+(y₂-y₁)]²
d=√[(-1-3)²+(1-4)²]
d=√(16+9)
d=√25
d=5