$\"\"$

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The points are A $\"\"$ .

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The distance between two points $\"\"$ is $\"d$ .

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$\"\"$ (Substitute $\"\"$ )

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$\"\"$ (Subtract: $\"\"$ )

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$\"\"$ (Evaluate powers: $\"\"$ )

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$\"\"$ (Add: $\"\"$ )

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$\"\"$ (Write factor of greatest square) \ \

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$\"\"$ (Product of square roots property) \ \

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$\"\"$ (Write 25 as $\"\"$ ) \ \

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$\"\"$ units. (Cancel square and root) $\"\"$

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The answer is D.