1. Nov 24, 2016

### fanieh

1. The problem statement, all variables and given/known data

How to solve for kd or equation with 2 unknowns given:
b= 10
n= 8
As = 2.37

2. Relevant equations

for the quadratic equation b * (kd)^2 /2 - n * As (d - kd) = 0

3. The attempt at a solution

should one use algebra, calculus, what? how do you solve for kd? this is not homework.. just want to know how.. please show the steps.. thanks..

2. Nov 24, 2016

### BvU

Why not just google the terms ?
Have you ever seen the textbook on how to solve $\ ax^2+bx+c=0\$ for $\ x \$ ?
That recipe leaves you with an expression(*) of kd as a function of d, which is all you can expect from one equation with two unknowns.

(*) actually, a bit more: you'll also get criteria for d that allow kd to be real number(s).

3. Nov 24, 2016

### Ray Vickson

We are not allowed to "show the steps"; that violates PF policy. We can only offer hints.