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Find the values of y for which the distance between the points P (2, – 3) and Q (10, y) is 10 units. Q.8

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How i solve the  coordinate geometry questions easily . What is the best solution of  exercise 7.1  , please  help me to solve this question easily. Find the values of y for which the distance between the points P (2, – 3) and Q (10, y) is 10 units.

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  1. Given: Distance between (2, – 3) and (10, y) is 10.

    Using distance formula,

    NCERT Solutions for Class 10 Chapter 7-11

    Simplify the above equation and find the value of y.

    Squaring both sides,

    64 + (y + 3)2 = 100

    (y + 3)= 36

    y + 3 = ±6

    y + 3 = +6 or y + 3 = −6

    Therefore, y = 3 or -9.

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