Help with algebra equations
Hi, I'm having trouble doing two equations. I have no idea where to start on (or how to go about doing) the 1st one, and the 2nd - well I've endlessly tried many different ways, however it always ends up coming out wrong!!
The first is:
The power developed in an electrical circuit is given by P=10I - 8I^2, where I is the current in Amps. Determine the current necessary to produce a power of 2.5 watts in the circuit.
The second is:
Applying Kirchoff's laws to an electrical circuit produces the following equations:
Any help would be really appreciated