Find the value of y for which the distance between the points P(2,-3) and (10,y) is 10 units
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Answer:
Distance between two point (x
1
,y
1
) and (x
2
,y
2
) is given by,
=
(x
2
−x
1
)
2
+(y
2
−y
1
)
2
10
2
=(10−2)
2
+(y+3)
2
(y+3)
2
=10
2
−8
2
(y+3)
2
=6
2
y+3=±6
∴y=3ory=−9
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