Which is a factor of 2a(cubed) - 2a(squared) - 7a + 7?
A) (a - 1)
B) (a + 1)
C) (a - 7)
D) (a + 7)

Question

01-09-2017
Mathematics

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Which is a factor of 2a(cubed) - 2a(squared) - 7a + 7?
A) (a - 1)
B) (a + 1)
C) (a - 7)
D) (a + 7)

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choixongdong choixongdong · Answer 1 · 2017-09-01T17:45:15+02:00

choixongdong choixongdong

01-09-2017

2a(cubed) - 2a(squared) - 7a + 7
= 2a^3 - 2a^2 - 7a + 7
= 2a^2 (a -1) - 7 (a -1)
= (a - 1)(2a^2 - 7)

(a - 1) and (2a^2 - 7) are factors

answer
A) (a - 1)

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Which is a factor of 2a(cubed) - 2a(squared) - 7a + 7? A) (a - 1) B) (a + 1) C) (a - 7) D) (a + 7)

Respuesta :

Otras preguntas

Which is a factor of 2a(cubed) - 2a(squared) - 7a + 7?
A) (a - 1)
B) (a + 1)
C) (a - 7)
D) (a + 7)