let A be (x1,y1)= -1,1
B be (x2,y2)= 3,-5
distance between AB = root under (x2-x1)square + (y2-y1)square
=root under (3- - 1)square +(-5-1)square
= root under 4 square + (-6) square
=root under 16 +36
=root under 52 units
is ur answer
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