# Thread: I need help here (remainder theorem)

1. ## I need help here (remainder theorem)

I need help with this remainder theorem question please:

If f(x)=3x (to the 5th power)-9x+7, use the remainder theorem to find f(3).

Thanks,

krashkrewsgt

2. Originally Posted by krashkrewsgt
I need help with this remainder theorem question please:

If f(x)=3x (to the 5th power)-9x+7, use the remainder theorem to find f(3).
Code:
3].....3......0.....0......0.....-9......7
..............9.....27....81....243....702
-------------------------------------------
.......3......9.....27....81....234....709

3. Use long division to to divide $\displaystyle 3x^5-9x+7$ by $\displaystyle x-3$. The remainder of the long division will be what f(3)=