if each pair of the equation `x^2 + ax + b=0, x^2 + bx + c =0 and x^2 + cx + a = 0` has common root, then product of all common root is

IF every pair from the equation x^2 +px +qr =0 , x^2 +qx + rp =0 and x^2 + rx +pq =0 has a common root , them the product of three common roots is

If every pair from among the equations x^2 + px + qr = 0, x^2 + qx +rp = 0 and x^2+rx +pq = 0 has a common root then the product of three common root is

If the equation ax^(2) + bx + c = 0 and 2x^(2) + 3x + 4 = 0 have a common root, then a : b : c

If the equation ax^(2) + bx + c = 0 and 2x^(2) + 3x + 4 = 0 have a common root, then a : b : c

If every pair of equations x^2+ax+bc=0, x^2+bx+ca=0 and x^2+cx+ab=0 has a common root then their sum is

If every pair of equations x^2+ax+bc=0, x^2+bx+ca=0 and x^2+cx+ab=0 has a common root then their sum is

If the equations x^(2) - ax + b = 0 and x^(2) + bx - a = 0 have a common root, then

If the equations x^2 + 2x + 3 = 0 and ax^2 + bx + + c = 0 have common root, then a : b : c is _____