Can this polynomial be factored
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Can this polynomial be factored

[From: ] [author: ] [Date: 11-12-20] [Hit: ]
Thanks!-Yes is can!Have a good day!-According to the Fundamental theorem of Algebra, f(x)=x^3-7x-6 has at least 1 real zero in the set of real numbers, call this zero a.......
Not solved, just factored? Can it be factored?
x^3 - 7x - 6
Thanks!

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Yes is can!

(x+1)(x+2)(x-3)

Have a good day!

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According to the Fundamental theorem of Algebra, f(x)=x^3-7x-6 has at least 1 real zero in the set of real numbers, call this zero a. By the factor theorem, (x-a) is a factor of f(x).
Trial and error yields f(-1)=0, f(2)=0, and f(3)=0
f(x)=(x+1)(x-2)(x-3)

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yes. it helps to set the equation equal to zero in order to factor.

x^3 - 7x - 6 =0

by inspection, we can see that x=-1 satisfies this equation.

so factor out (x+1)

(x+1)*(x^2-x-6)

and x^2-x-6 also factors, giving you

(x+1) * (x+2) * (x-3)

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Yes. Its Factors are (x+2) , (x+1), and (x-3)
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