Question

I will give medals!!
Use the Rational Zeros Theorem to write a list of all possible rational zeros of the function.

f(x)= 2x^3 + 8x^2 + 7x - 8

Answer 1

Find possible factors of the leading coefficient for 2x^3.
Find possible factors for (-8)

Answer 2

http://www.mathportal.org/algebra/polynomials/zeroes-of-polynomials.php

Answer 3

how do I do that?
for -8 would it just be -1, 1, 2,-2, 4,-4,8,-8

Answer 4

yes
now do that for the 2 also.

Answer 5

1,-1,2,-2? but what about the ^3 part?

Answer 6

the rational roots theorem says
if f( p/q) = 0 , then p divides the last coefficient and q divides the first coefficient

Answer 7

the last coefficient being the 'constant' term

Answer 8

here p divides -8, and q divides 2

Answer 9

so we can make a list of divisors for p , and q

Answer 10

@perl which we have.