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# Quick question on factoring polynomials using the factor theorem watch

1. When factorising using the factor theorem, do I just input different possible values of f(x) until i get an equation that equals 0? Or is there a specific method that i'm forgetting about?

I've tried 1, -1, 2, -2 and 3 but i'm starting to wonder if i'm just doing it wrong.
2. (Original post by chuchubee)
When factorising using the factor theorem, do I just input different possible values of f(x) until i get an equation that equals 0? Or is there a specific method that i'm forgetting about?

I've tried 1, -1, 2, -2 and 3 but i'm starting to wonder if i'm just doing it wrong.
yes, you should let x= those values,
maybe try posting the question here and see if people can help
3. (Original post by yusyus)
yes, you should let x= those values,
maybe try posting the question here and see if people can help
The question is:

x^3 - 6x^2 + 11x - 6

so is it just trial and error?
4. (Original post by chuchubee)
The question is:

x^3 - 6x^2 + 11x - 6

so is it just trial and error?
Pretty much. You have to input x values which are factors of -6 until your answer equals 0
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5. (Original post by chuchubee)
The question is:

x^3 - 6x^2 + 11x - 6

so is it just trial and error?
subbing x=1 should give you 0
6. Use ur class wiz calculator... go to menu, press 9 (table) input ur f(x), ignore the g(x), then use -10 for min, step 1, max 10 then press enter

Look for where f(x) = 0 and use the value on the LHS
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7. if you have a graphical calculator you can plot the curve and see where it crosses the x axis ?

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