RandomHumanBeing RandomHumanBeing

16-04-2017
Mathematics

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if (x+5) is a factor of 3x^2+14x+k, what is the value of k?

Respuesta :

16-04-2017

If (x+5) is a factor the equation will equal zero when x=-5 so

3(-5^2)+14(-5)+k=0

75-70+k=0

5+k=0

k=-5

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