The equation of the parabola whose focu...

The equation of the parabola whose focus is at (-1,-2) and the directrix is the straight line x-2y+3=0 is `a_(0)x^(2)+a_(1)y^(2)+a_(2)xy+a_(3)x+a_(4)y+16=0`then find value of `a_(0)+a_(1)+a_(2)+a_(3)+a_(4)`

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