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ICSE Class 9 Answered

question no 202
Asked by ashwinipandey7355 | 06 Jan, 2020, 10:39: PM
Expert Answer
Given that distance between A(x, -7) and B(2, 5) is 13 units
 
AB = 13
AB2 = 169
(x - 2)2 + (-12)2 = 169
Simplifying this we get
x2 - 4x - 21 = 0
(x - 7)(x + 3) = 0
x = 7 or x = -3
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