Two marks example problems II — task. Mathematics State Board, Class 9.

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1. Find the distance between the points

$(–4, 3)$ ,

$(2,–3)$ .

$d$

$=$

$i \sqrt{i}$

2. Show that the following points

$A(3, 1)$ ,

$B(6, 4)$ and

$C(8, 6)$ lie on a straight line.

$AB$

$=$

$i \sqrt{i}$

$BC$

$=$

$i \sqrt{i}$

$AC$

$=$

$i \sqrt{i}$

$AB + BC =$

$i \sqrt{i}$

The points .

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