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If the sides PQ and QR of `Delta PQR` are the perpendicular bisector of AB and AC, which are sides of `Delta ABC`. Find the equation of BC, If coordinates of P,Q, R and A are `(-1,0), (0,-1),(2,0) and (1/2,-1/2)`

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`=>` Equation of BC is` (y + (3)/(2)) = ((- (9)/(10) +(3)/(2)))/(((7)/(10 ) + (1)/(2)))(x + (1)/(2)) => 2x - 4y - 5 =0`
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