Problem 128 of 7
Use substitution of a repeated sub-expression to factor (x^2+3)^2-16x^2.
Using a hint is okay. It just tells the trainer to give you a little more review.
Hidden until you reveal it.
treat repeated expression as a unit.
Hidden until you reveal it.
Expression must be quadratic-in-form or contain a repeated grouped expression.
Enter your answer
Your answer is equivalent to the expected form.
Walkthrough
Full solution stays hidden until you ask for it.
1. Name the repeated sub-expression as a temporary variable.
2. Factor the simpler expression in that variable.
3. Substitute the original expression back and factor further when possible.
Use the worked steps, then substitute the final answer back into the original relationship to confirm it satisfies the prompt.
Expanding everything when the prompt asks to use hidden structure and the final factorization is incorrect.