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Three vertices of a quadrilateral in ord...

Three vertices of a quadrilateral in order are `(6,1)(7,2)" and "(-1,0)`. If the area of the quadrilateral is 4 sq. unit. Then the locus of the fourth vertex has the equation.

A

`x+7y=1`

B

`x-7y+15=0`

C

`(x-7y)^(2)+2(x-7y)-3=0`

D

`(x+7y)^(2)+14(x+7y)-15=0`

Text Solution

Verified by Experts

The correct Answer is:
A
Domain is `x in (-1,1)`
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