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Factor x4+8x2+16x^4 + 8x^2 + 16 completely.\newlineAll factors in your answer should have integer coefficients.\newline______

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Q. Factor x4+8x2+16x^4 + 8x^2 + 16 completely.\newlineAll factors in your answer should have integer coefficients.\newline______
  1. Identify Polynomial: We are given the polynomial x4+8x2+16x^4 + 8x^2 + 16 and asked to factor it completely. The polynomial resembles a perfect square trinomial, which has the form (a2+2ab+b2)=(a+b)2(a^2 + 2ab + b^2) = (a + b)^2. We will attempt to express the given polynomial in this form.
  2. Identify Square of First Term: First, we identify the square of the first term. The first term of the polynomial is x4x^4, which is the square of x2x^2. So, we have a=x2a = x^2.
  3. Identify Square of Last Term: Next, we identify the square of the last term. The last term of the polynomial is 1616, which is the square of 44. So, we have b=4b = 4.
  4. Check Middle Term: Now, we check if the middle term of the polynomial fits the pattern of a perfect square trinomial. The middle term is 8x28x^2, and for a perfect square trinomial, the middle term should be 2ab2ab. We have a=x2a = x^2 and b=4b = 4, so 2ab=2×x2×4=8x22ab = 2 \times x^2 \times 4 = 8x^2, which matches the middle term of the polynomial.
  5. Write as Square of Binomial: Since the polynomial fits the pattern of a perfect square trinomial, we can write it as the square of a binomial. The binomial is (a+b)(a + b), where a=x2a = x^2 and b=4b = 4. Therefore, the polynomial can be factored as (x2+4)2(x^2 + 4)^2.
  6. Check Further Factorization: Finally, we check if the binomial (x2+4)(x^2 + 4) can be factored further with integer coefficients. Since x2+4x^2 + 4 does not have real roots and cannot be factored over the integers, we conclude that (x2+4)2(x^2 + 4)^2 is the complete factorization of the polynomial.

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