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S_A_V [24]
3 years ago
15

Factor completely: 81x4 – 81 (9x2 + 9)(9x2 – 9) (3x + 3)2(3x – 3)2 (3x + 3)(3x – 3) (9x2 + 9)(3x + 3)(3x – 3)

Mathematics
2 answers:
Eduardwww [97]3 years ago
7 0
Last voice (9x^2+9)(3x-3)(3x+3)
Aleksandr [31]3 years ago
5 0
81 is the same as 3⁴.

Thus, we can write it as:
(3x)^{4} - 3^{4}
= [(3x)^{2}]^{2} - [3^{2}]^{2}
= [(3x)^{2} - 3^{2}][(3x)^{2} + 3^{2}]
= (3x - 3)(3x + 3)[(3x)^{2} + 3^{2}]
= (3x - 3)(3x + 3)(9x^{2} + 9)
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