Question 4 • Algebra I
A polynomial is prime if it cannot be factored into lower-degree polynomials with integer coefficients. The other choices factor: B is (x − 2)(x + 1), C is (x − 1)(x − 11), and D is (x + 4)(x − 2). For A, x² + x + 1 has no integer pair whose product is 1 and sum is 1, so it is prime.
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