find the values of 'a' for which the distance between the points A (2,-3) &B (10,a) is 10 units.
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3 or -9 because distance formula
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1
a=3
100=a.a+6a+73
=a.a+6a-27
=a.a+9a-3a-27
=a(a+9)-3(a+9)
=(a-3)(a+9)
100=a.a+6a+73
=a.a+6a-27
=a.a+9a-3a-27
=a(a+9)-3(a+9)
=(a-3)(a+9)
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