What is the quotient: (3x^2 + 8x – 3) ÷ (x + 3) ?
I think this is the right answer but I'm not sure?
3x – 5

Question

What is the quotient: (3x^2 + 8x – 3) ÷ (x + 3) ? 
I think this is the right answer but I'm not sure?
 3x – 5

helder_edwin · Answer

why don't u multiply (x+3)(3x-5) and see what you get

helder_edwin · Answer

also what is the remainder you got?

anonymous · Answer

I got a remander of 1.

anonymous · Answer

so could this answer 3x + 5, r = 1 be right?

helder_edwin · Answer

no!
if you replace x=-3 if your cuadratic polynomial
what do u get?

anonymous · Answer

so if I multiply like you said I get 3x^3-5+6x-15??

helder_edwin · Answer

did replace x=-3 in your cuadratic polynomial?

anonymous · Answer

no I mutiplyied like you said to do first.

anonymous · Answer

but if I do it that way I just substitute all the x with -3?

helder_edwin · Answer

yes

anonymous · Answer

and then I get my answer?

helder_edwin · Answer

you get your remainder

anonymous · Answer

and then what?

helder_edwin · Answer

$$ \large \begin{array}{c|ccc}
                  & 3 & 8 & -3\ -3 && -9 & 3\\hline 
                  & 3 & -1 & 0
              \end{array} $$

helder_edwin · Answer

do u know this.
here we call it Ruffini's rule

anonymous · Answer

and then you would turn it into 3x-1 right?

helder_edwin · Answer

yes

anonymous · Answer

and yah, I know that but I call it something diff.

anonymous · Answer

okay thanks.

helder_edwin · Answer

u r welcome