dragongacha777
02.12.2020 •
Mathematics
Mr. Diaz needs to park his car. For how many hours does Mr. Diaz need to park in order for the cost to be the same in both lots? Lot A: 4hrs - $19.00 8hrs $33.00 Lot B: - 4hrs $20.00 8hrs $32.00
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Ответ:
(a-1) *(a^2 +a-1) (a+2)
Step-by-step explanation:
a^4+2a^3-a-2
Lets factor by grouping
a^4-a + 2a^3-2
Factor out an a from the first group and a 2 from the second group
a(a^3 -1) +2(a^3-1)
Factor out (a^3-1)
(a^3-1)(a+2)
We need to recognize that a^3-1 is the difference of cubes
(x^3-y^3) = (x-y) (x^2+xy+y^2)
Let x=a and y=1
(a-1) *(a^2 +a-1) (a+2)