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Is x - 1 factor of 7x ^ 3 - x ^ 2 - x - 5 ?
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Is x - 1 factor of 7x ^ 3 - x ^ 2 - x - 5 ?

User ADH
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1 Answer

11 votes

Answer:

Explanation:

f(x) = 7x³ - x² - x - 5

To test if (x-1) is a factor, calculate f(x) for x=1:

f(1) = 7·1³ - 1² - x - 5 = 0

Since f(1) = 0, (x-1) is a factor.

User Ncmathsadist
by
6.1k points
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