Question

pls answer the question
i will mark u as brainlist and will follow u
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Answer 1

Answer:

using distance formula

√ (1-5) ^2 + (a+2) ^2

√ (-4) ^2 + a2 + 4 +4a

16+4 +a2 +2a

a2 +2a + 20

Now discriminate

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