Simplify completely
x2 + 4x - 45
and find the restrictions on the variable.
![Simplify completely x2 4x 45 and find the restrictions on the variable class=](https://us-static.z-dn.net/files/dc9/f89c8c988c8079eb46ba7aa6c682d1ad.png)
Answer:
(x-5)/(x+1) and x cannot equal -1 because the denominator can't be zero.
Step-by-step explanation:
Factor the numerator:
(x+9)(x-5)
Factor the denominator:
(x+1)(x+9)
So you have
(x+9)(x-5)/(x+1)(x+9); see that you can cross out the (x+9) in both the numerator and denominator?
You're left with (x-5)/(x+1)
The only number that is restricted is -1, because that would make the denominator zero, which is a no no!!