Work Step by Step
The statement is true because $x^2+4$ is prime. We know it is prime because there are no factors of $4$ that sum to the middle term $0$ (since we can re-write the polynomial as $x^2+0x+4$).
You can help us out by revising, improving and updating this answer.Update this answer
After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.