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  • If the distance between two points ( x , 7 ) and (1, 15) is 10, What is x.

If the distance between two points ( x , 7 ) and (1, 15) is 10, What is x.

Answers (1)

By distance formula

\\10=\sqrt{(1-x)^2+8^2}\\\\100=x^2+1-2x+64\\\\x^2-2x-35=0\\\\(x-7)(x+5)=0\\x=7\ or \ x=-5

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Safeer PP

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