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# Remainder theorem help watch

1. Can someone help me with this question

Divide 2x^2+4x+5 by x^2 -1 using the remainder theorem (divisor method)

Also, does anyone know of any videos or sites that can help teach me this method?

2. Thanks, but do you know of any ways of doing it without the long divison? Since I'm reallly bad at it.

Also, does comparing coefficients work for divisor polynomials bigger than 2?
3. You could just try small numbers and put them into the function in place of x and see if the function equals 0. If say f(2)=0 the. (x-2) is a factor of f(x)
You could try this for other numbers and then find all the factors this way. However sometimes factors of a polynomial contain fractions or irrational numbers and it just isn't an efficient way to find the factors especially for cubic and quartic and higher order equations. To be honest it's best to find one factor using the factor theorem and then find the other factors using long division. I would just learn how to do it to be honest.
4. (Original post by emerl98)
Can someone help me with this question

Divide 2x^2+4x+5 by x^2 -1 using the remainder theorem (divisor method)

Also, does anyone know of any videos or sites that can help teach me this method?

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Updated: September 15, 2015
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