Question

Find the nonpermissible replacement for b in this expression

b^2/-5b+5

Answer 1

-5b +5 = 0
-5b = -5
b = -1

For this equation to b cannot equal -1.

Answer 2

b cannot equal 1*

Answer 3

if only there was some rule for determining what is nonpermissible and that could apply to ALL equations ... hmmm ;)

Answer 4

so it would be 1 or -1?

Answer 5

what do you get for the denominator when b=-1?

Answer 6

it would be 1. sorry, it's late at night.
You are aimining to get the denominator equal to 0. If b =1 the denominator is 0

Answer 7

10

Answer 8

n yea i just got it itz 1

Answer 9

very good :)