what is the factor of 1-81xpower4
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1 - 81x⁴
= (1)² - (9x²)²
= (1-9x²)(1+9x²)
= [(1)²-(3x)²][1+9x²]
= (1-3x)(1+3x)(1+9x²)
So, the factors of 1-81x⁴ are (1-3x), (1+3x) and (1+9x²).
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