a3 - 125-2a + 10
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Answer:
Simplify the following:
a^3 - 2 a - 125 + 10
Grouping like terms, a^3 - 2 a - 125 + 10 = a^3 - 2 a + (-125 + 10):
a^3 - 2 a + (-125 + 10)
10 - 125 = -115:
a^3 - 2 a + -115
The possible rational roots of a^3 - 2 a - 115 are a = ± 1, a = ± 5, a = ± 23, a = ± 115. Of these, a = 5 is a root. This gives a - 5 as all linear factors:
((a - 5) (a^3 - 2 a - 115))/(a - 5)
| |
a | - | 5 | | a^2 | + | 5 a | + | 23
a^3 | + | 0 a^2 | - | 2 a | - | 115
a^3 | - | 5 a^2 | | | |
| | 5 a^2 | - | 2 a | |
| | 5 a^2 | - | 25 a | |
| | | | 23 a | - | 115
| | | | 23 a | - | 115
| | | | | | 0:
Answer: |
| a^2 + 5 a + 23 (a - 5)
Step-by-step explanation:
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Answered by
0
Step-by-step explanation:
A3 - 125-2a +10=0
a3-115-2a=0
a3-2a =115
a(a2-2)=115
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