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+1 vote
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If a(b-c)x2 + b(c-a)xy + c(a-b)y2=0 is a perfect square

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+2 votes
by (45 points)
Okay i will give u a little help here

U know that for any equation of type  ax^2+2hxy+by^2  to be a perfect square this equation must be similar to x^2+y^2+2xy

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