if 5 x * x + 14 * x + k = 0 having two reciprocal roots find the value of k .
product of reciprocal roots = 1 product of roots of quadratic eqn ax ^ 2 + bx + c = 0 is c / a . hence k / 5 = 1 k = 5 answer : e
subtract(14, subtract(14, 5))