Question

Find the excluded value of x for the polynomial expression: . x-8/8x+1
8
-8
1/8
-1/8

Answer 1

why would we need to exclude any value?

Answer 2

idk

Answer 3

ok, tell me then; what is 5/0 ?

Answer 4

if we try to solve that we get:

5/0 = n


5 = 0*n ; how could we possibly work that out?

Answer 5

i dont kno thats y i need help

Answer 6

this is the help

Answer 7

dividing by zero is a mathical nono. so, we need to exclude anything that would make the denominator equal to zero

Answer 8

when does: 8x-1 = 0 ?

Answer 9

err, 8x + 1 = 0 that is

Answer 10

when its a negative

Answer 11

good start, x would have to be a negative number at least

Answer 12

you have two negatives to choose from; if anything you can plug them in to see what fits

Answer 13

so it would be -1/8

Answer 14

so it would be -1/8

Answer 15

-1/8 is correct :)