Use the FOIL method to find the product (7x^7-9)(x^8-9)?
回答 (4)
2008-12-13 3:09 pm
✔ 最佳答案
(7x^7-9)(x^8-9) = (7x^15)-(9x^8)-(63x^7)+81
that's the final answer.
2008-12-13 11:08 pm
7x^15-56x^7-9x^8+81
2008-12-13 11:29 pm
7 x^15 - 63 x^7 - 9 x^8 + 81
2008-12-13 11:11 pm
(7x^7 - 9)(x^8 - 9)
= 7x^7*x^8 - 9*x^8 - 7x^7*9 + 9*9
= 7x^15 - 9x^8 - 63x^7 + 81
= 7x^7*x^8 - 9*x^8 - 7x^7*9 + 9*9
= 7x^15 - 9x^8 - 63x^7 + 81
收錄日期: 2021-05-01 11:38:00
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