Question

if 4 be a root of x2-bx+8=0 and x2 +bx+c=0 has equal roots then find b-c

Answer 1

For every quadratic equation, there can be one or more than one solution. These are called the roots of the quadratic equation. For a quadratic equation ax2+bx+c = 0, the sum of its roots = –b/a and the product of its roots = c/a.