math 數學 Factor Trinomials
Factor the following trinomials.
1) a^2-7ab-120b^2
2) 4(3x-y)^2+21(3x-y)+5
3) 15a^5+15a^3b^3-90ab^4
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回答 (2)
✔ 最佳答案
1) a^2-7ab-120b^2
=(a-15b)(a+8b)
2) 4(3x-y)^2+21(3x-y)+5
=[4(3x-y)+1][(3x-y)+5]
=(12x-4y+1)(3x-y+5)
3) 15a^5+15a^3b^3-90ab^4
=5(3a^5+5a^3b^3-18ab^4)
參考: ME
Question 3:
中間的 term , +15a^3b^3, 有沒有打錯?
如果沒有打錯, 應該是
15a^5+15a^3b^3-90ab^4
15a (a^4 + a^2b^3 - 6b^4)
收錄日期: 2021-04-11 19:11:22
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