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Given f(x)=x^3+5x+k, and x+2 is a factor of f(x), then what is the value of k?
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Given f(x)=x^3+5x+k, and x+2 is a factor of f(x), then what is the value of k?

User MichaC
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2 Answers

4 votes

Answer: Hopes this helps

Explanation:

Given f(x)=x^3+5x+k, and x+2 is a factor of f(x), then what is the value of k?-example-1
User Marcelo Tataje
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3.3k points
14 votes
3x^3+0x^2-2x+k:x-2=3x^2+6x+10
3x^2-6x^2
6x^2-2x
6x^2-12x
10x+k
10x-20
k+20
Thus k=-20
User Meatvest
by
3.9k points
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