Question

can someone help me with pre-cal???

Answer 1

post the problem, please

Answer 2

use the factor theorem to determine which of the following is NOT one of the factors of 4x^4-21x^3-22x^2+117x+90

Answer 3

what choices are you given?

Answer 4

a. x-3
b. x-5
c. x-2

Answer 5

what you do is set each factor equal to zero and solve for x

eg: x-3 = 0 ----> x = 3

then plug x = 3 into `4x^4-21x^3-22x^2+117x+90`. What result do you get when you plug in x = 3?

Answer 6

i get 0

Answer 7

me too

since the result is 0, this means that x-3 is a factor so we can rule out this answer choice

Answer 8

x-5 = 0

x-5+5 = 0+5 ... add 5 to both sides

x = 5

plug x = 5 into `4x^4-21x^3-22x^2+117x+90` and what do you get?

Answer 9

i got zero for five also

Answer 10

so the answer is C because i got 132 for x-2

Answer 11

yep x-2 is NOT a factor

Answer 12

Thank you very much you teach it better then my teacher :)

Answer 13

I'm glad I could help