Question

Identify the values restricted from the domain of the expression.
x+6 / x^2 + 7x-8

Answer 1

Hint the denominator cannot have a vule of zero

Answer 2

Can one of the values be 1..?

Answer 3

yes that would make the bottom part zero
if you factor the denominato you'll find the other value

Answer 4

I got 8..but I think it might be -8..

Answer 5

Would that be right?

Answer 6

x^2 + 7x - 8 = (x - 8)(x + 1)

so if x is either 8 or -1 the denominator will be 0

Answer 7

Its -1 not 1

Answer 8

wouldn't it be 1 and -8?

Answer 9

as the restricted values?

Answer 10

oooh - whats wrong with me today
forget that last post and start again
x^2 + 7x - 8 = (x + 8)(x - 1)

so x = -8 or x = 1 will make the denominator zero

the restricted values are x = 1 and -8

right second time lol!

Answer 11

restricted values from the domain are 1 and -8.

Answer 12

yes - you were right

Answer 13

Thank you! :D

Answer 14

yw