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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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Which is a factor of 2a(cubed) - 2a(squared) - 7a + 7?

A) (a - 1)
B) (a + 1)
C) (a - 7)
D) (a + 7)

User Piyush Dubey
by
8.2k points

1 Answer

4 votes
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)
User Dan Higham
by
7.7k points
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