One vertex of an equilateral triangle is (2,3) and the equation of one side is x-y+5=0. Then the equations to other sides are

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y−3=−(2±3)(x−2)

y−3=(2±1)(x−2)

y−3=(3±1)(x−2)

y−3=(5±1)(x−2)

answer is A.

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Detailed Solution

Let slope of another side is m tan600=m−11+m; m=−2±3

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