How to solve this

2. Turns out, the CO2 molecules in the atmosphere sometimes just fall apart. At pressure of P atmospheres, a certain fraction q of a gas decomposes. The quantities P and q are related, for some positive constant K, by the equation 492 P = K. 1 - q2 (a) Use implicit differentiation to find dq/dP. (In this case implicit differentiation really is easier than expressing q through P explicitly. And you won't get credit for explicit differentiation, anyway.)