Question

use the rational root theorem to list all possible rational roots of the polynomial equation x3-x2-8x+=4

a. -4,-1,1,4
b.-4,-2,-1,1,2,4
c.no roots
d.1,2,4

Answer 1

+=4?

Answer 2

yes

Answer 3

or what do you mean

Answer 4

What does plus equal mean here? Is our equation\[x^3 -x^2-8x = 4 \]or\[x^3 -x^2-8x+(something) = 4 \]

Answer 5

it is x3-x2-8x+4=0

Answer 6

Ok, then our rational roots will be the all factors of 4 over the all factors of 1. The 1 comes from the coefficient of x^3.

Answer 7

'possible

Answer 8

ok

Answer 9

so would it be the awnser b

Answer 10

Yes

Answer 11

thank you hey can you help me on another problem

Answer 12

Sure

Answer 13

find the roots of x3-2x2+5x-10=0

Answer 14

a.2+isquare root 5
b. 1 +5
c.5 + square root 7
d. -1 + square root 3

Answer 15

Apply the Rational Root Test. So, the possible roots are plus or minus 1, 2, 5, 10. We can test these to see if they are solutions to the equation.

Answer 16

Does option b need to be rewritten?