i need to find the zeros for this problem: x^4+x^3-15x^2-16x-16

Question

i need to find the zeros for this problem:    x^4+x^3-15x^2-16x-16

anonymous · Answer

anyone?

el_tucan · Answer

what you need to find out is what values for x when you graph this function will give you zero. You wanna use the rational roots theorem which basically says that you take all factors of both your leading coefficient and constant term which are 1 and -16 respectively. So you divide all the possible combinations of factors of -16 divided by all the factors of 1 which is one. So one + or - value of 1,2,4,8,16 will give you your zero. Do you know synthetic division? I'll make you a sketch. hold on. graph the function in a calculator and input factors of 16 for x.

el_tucan · Answer

http://www.wtamu.edu/academic/anns/mps/math/mathlab/col_algebra/col_alg_tut38_zero1.htm

el_tucan · Answer

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