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# C1 factor theorem question, urgent help needed! watch

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1. I have the question "solve P(x+10) = 0."

P(x)= x³+kx²-5x+6

The factors are (x-1)(x-3)(x+2) if worked correctly and roots 1, 3 and -2. K is equal to -2.

how do i solve P(x+10) = 0 from this information i have? what is it asking?
2. first of all i'm assuming there was other info given in the question that lead you to find k.

if so, then i guess you could just write:

P(x) = (x -1)(x - 3)(x + 2) and then subsitude x for (x +10) and thus set p(x) = 0
you'll then get out another set of x values

this is no different than finding the roots (x intercepts) of P(x), now its just transformed to P(x + 10). You'll find different roots.

could you please write out the question as is, with all included information?
3. ok. well it was a 4 part question. those are my factors and my K value, and my roots. part d) solve p(x+10) = 0. ive sort of done it though, i substituted x+10 in the X values and got (x+9)(x+7)(x+12)
4. C1 doesnt require the factor theorem btw.
5. c2 is factor or maybe c3 but def not c1 i think

and you will need to redo that question bro !!
6. (Original post by r0manticide17)
ok. well it was a 4 part question. those are my factors and my K value, and my roots. part d) solve p(x+10) = 0. ive sort of done it though, i substituted x+10 in the X values and got (x+9)(x+7)(x+12)
Just put (x+10) in the place of all the x's in P(x) and you'll get an equation. Solve it to get the answer.
7. yeah they ask for factor theorem in the AQA exam
8. Yup, it depends on the exam board - some boards put it in C1, others put it in C2.

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