If the roots of `ax^(2)+bx+c=0` are `-1,-2` then `a:b:c`

If the roots of ax^(2) + bx + c are alpha,beta and the roots of Ax^(2) + Bx + C=0 are alpha- K,beta-K , then (B^(2) - 4AC)/(b^(2) - 4ac) is equal to -

If both the roots of ax^(2)+bx+c=0 are negative and b<0 then :

If the roots of ax^(2)+b(2x+1)=0 are imaginary then roots of bx^(2)+(b-c)x=c+a-b are

Let a,b and c be three real and distinct numbers.If the difference of the roots of the equation ax^(2)+bx-c=0 is 1, then roots of the equation ax^(2)-ax+c=0 are always (b!=0)

If the roots of the equation ax^(2)+bx+c=0 are equal then c=?

If the roots of 2x^(2) + 7x + 5 = 0 are the reciprocal roots of ax^(2) + bx + c = 0 , then a-c = "_____" .

If alpha,beta are the roots of ax^(2)+bx+c=0 then those of ax^(2)+2bx+4c=0 are