Question

If one zero of the quadratic polynomial f(n)= 14x^2-42k^2+x-9 is negative of the other find the value of k

Answer 1

let the one zero be a then the other is -a so we know sum of roots= - <coefficient of x>/<coefficient of x^2> so a - a = - < - 42k^2>/<14> , 0 = k^2 so k = 0