If `x^(2)+ax+b=0` and `x^(2)+bx+a=0,(a ne b)` have a common root, then `a+b` is equal to

If the quadratic equation x^(2) +ax +b =0 and x^(2) +bx +a =0 (a ne b) have a common root, the find the numeical value of a +b.

If the quadratic equations ax^2+2cx+b =0 and ax^2+2bx+c =0 (b ne 0) have a common root, then a+4b+4c is equal to

If x^(2) + ax + b = 0, x^(2) + bx + a = 0 ( a != 0 ) have a common root, then a + b =

If x^(2) + ax + b = 0, x^(2) + bx + a = 0 ( a != 0 ) have a common root, then a + b =

If x^(2)+ax+bc=0 and x^(2)+bx+ca=0 have a common root,then a+b+c=1

If x^(2)+ax+10=0" and "x^(2)+bx-10=0 have a common root, then a^(2)-b^(2) is equal to