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![[Post New]](/templates/default/images/icon_minipost_new.gif) 29 Mar 2008 21:20:56 IST
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use the method of determinants
solve it like this
| | = stands for determinants
| x1 y1| + | x2 y2 | + | x3 y3 | + | x4 y4 |
| x2 y2 | | x3 y3 | | x4 y4 | | x1 y1 |
= (x1y2 - x2y1) + (x2y3 - x3y2) + (x3y4 - x4y3) + (x4y1 - x1y4)
put values and get the ans..
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I DONOT FOLLOW THE RULES I MAKE THEM TO FOLLOW ME. |
this reply: 7 points
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