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Use the factor theorem to determine which of the following is a factor of f(x)=x^3+5x2-15x+9

x-2

x+1

x-1

x+2

show work please

User Struberg
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1 Answer

2 votes

x+2

Explanation:

x+2

If x = –2 is a zero, then x + 2 = 0, so x + 2 is a factor. Similarly, if x = 1/3 is a zero, then x – 1/3 = 0, so x – 1/3 is a factor. By giving me two of the zeroes, they have also given me two factors: x + 2 and x – 1/3.

User Edralph
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