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Snowcat [4.5K]
3 years ago
12

Why cant 81-x to the forth power be factored unti (3+x) squared times (3-x) squared

Mathematics
1 answer:
cricket20 [7]3 years ago
6 0

Answer:

Below.

Step-by-step explanation:

81 - x^4        Treat as the difference of 2 squares:

= (9 - x^2)(9 + x^2)

We can further factor the 9 - x^2   (difference of 2 squares)

= (3 - x)(3 + x)(9 + x^2).

9 + x^2 can't be factored.

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