If `x^2+a x+10=0` and `x^2+b x-10=0` have common root, then `a^2-b^2` is equal to 10 (b) 20 (c) 30 (d) 40

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

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

If x^(2)+ax+10=0 and x^(2)+bx-10=0 have common root,then a^(2)-b^(2) is equal to 10 (b) 20(c)30 (d) 40

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

If x^(2)+ax+10=0andx^(2)+bx-10=0 have common root,then a^(2)-b^(2) is equal to 10 b.20 c.30 d.40

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 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 x^2 + a x + bc = 0 and x^2 + b x + c a = 0 have a common root , then a + b+ c=

If the quadratic equations, a x^2+2c x+b=0 and a x^2+2b x+c=0(b!=c) have a common root, then a+4b+4c is equal to: a. -2 b. 2 c. 0 d. 1