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Factor completely.

16x^(8)-1
Answer:

Factor completely.\newline16x81 16 x^{8}-1 \newlineAnswer:

Full solution

Q. Factor completely.\newline16x81 16 x^{8}-1 \newlineAnswer:
  1. Determine Approach: Determine the approach to factor 16x8116x^8 - 1. This expression is a difference of squares because it can be written as (4x4)212(4x^4)^2 - 1^2.
  2. Apply Formula: Apply the difference of squares formula.\newlineThe difference of squares formula is a2b2=(ab)(a+b)a^2 - b^2 = (a - b)(a + b). Here, a=4x4a = 4x^4 and b=1b = 1.\newlineSo, 16x81=(4x4)212=(4x41)(4x4+1)16x^8 - 1 = (4x^4)^2 - 1^2 = (4x^4 - 1)(4x^4 + 1).
  3. Check Further Factoring: Check if further factoring is possible.\newlineThe term 4x4+14x^4 + 1 cannot be factored further as it is not a difference of squares. However, 4x414x^4 - 1 is a difference of squares since it can be written as (2x2)212(2x^2)^2 - 1^2.
  4. Factor Further: Factor 4x414x^4 - 1 further using the difference of squares formula.\newlineWe have (2x2)212=(2x21)(2x2+1)(2x^2)^2 - 1^2 = (2x^2 - 1)(2x^2 + 1).
  5. Check Factoring: Check if further factoring is possible for the new terms.\newlineThe term 2x2+12x^2 + 1 cannot be factored further as it is not a difference of squares. The term 2x212x^2 - 1 is also a difference of squares since it can be written as (x2)212(x\sqrt{2})^2 - 1^2.
  6. Factor Further: Factor 2x212x^2 - 1 further using the difference of squares formula.\newlineWe have (x2)212=(x21)(x2+1)(x\sqrt{2})^2 - 1^2 = (x\sqrt{2} - 1)(x\sqrt{2} + 1).
  7. Combine Factored Terms: Combine all the factored terms to get the final factored form.\newlineThe fully factored form of 16x8116x^8 - 1 is (4x4+1)(2x21)(2x2+1)=(4x4+1)(x21)(x2+1)(4x^4 + 1)(2x^2 - 1)(2x^2 + 1) = (4x^4 + 1)(x\sqrt{2} - 1)(x\sqrt{2} + 1).