a^2-2a-24= can someone help?
回答 (7)
2008-07-10 4:45 pm
✔ 最佳答案
a^2 - 2a - 24 = 0a^2 - 2a + 1 = 25
a - 1 = ±5
a = -4 or a = 6
Factored form: a^2 - 2a - 24 = (a + 4)(a - 6)
2008-07-11 12:01 am
a^2-2a-24
a^2-6a+4a-24
a(a-6)+4(a-6)
(a-6)(a+4)
a^2-6a+4a-24
a(a-6)+4(a-6)
(a-6)(a+4)
2008-07-10 11:56 pm
a^2 - 2a - 24
= a^2 + 4a - 6a - 24
= (a^2 + 4a) - (6a + 24)
= a(a + 4) - 6(a + 4)
= (a + 4)(a - 6)
= a^2 + 4a - 6a - 24
= (a^2 + 4a) - (6a + 24)
= a(a + 4) - 6(a + 4)
= (a + 4)(a - 6)
2008-07-10 11:54 pm
a^2 - 2a - 24 = (a - 6)(a + 4) = 0
a- 6 = 0 -> a = 6
a + 4 = 0 -> a = -4
a- 6 = 0 -> a = 6
a + 4 = 0 -> a = -4
參考: Longtime college math teacher
2008-07-10 11:48 pm
a=1+i(sqroot47)
and 1-i9sqroot47)
and 1-i9sqroot47)
2008-07-10 11:47 pm
(a-6)(a+4)=0
a=6
a=-4
a=6
a=-4
2008-07-10 11:45 pm
a^2-2a-24
(a-6)(a+4)
a = 6, -4
(a-6)(a+4)
a = 6, -4
收錄日期: 2021-05-01 10:51:26
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