Problem 47 of 7
Isolate the squared variable I in formula P=I^2*R, choosing the branch that fits current magnitude.
Using a hint is okay. It just tells the trainer to give you a little more review.
Hidden until you reveal it.
take square roots and choose meaningful branch.
Hidden until you reveal it.
Target variable must be squared and context must require the nonnegative branch.
Enter your answer
Your answer is equivalent to the expected form.
Walkthrough
Full solution stays hidden until you ask for it.
1. Undo multiplication or division around the squared target.
2. Take the square root of both sides.
3. Use the context to keep the meaningful nonnegative branch.
Use the worked steps, then substitute the final answer back into the original relationship to confirm it satisfies the prompt.
Answers that omit the square root or keep an unnecessary negative branch in a length, radius, or speed context.