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Given P1 (- 1, a), P2 (3, 6) and the slope of p1p2 k = 2, | p1p2 | =? To find the detailed explanation
k=2
(6-a)/(3+1) =2
6-a=8
a=-2
|P1P2|^2 = (3+1)^2 + (6+2)^2=16+64=80
P1P2=4√5
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