Question

simplify each rational expression.
x^2+10x+25/ x^2+9x+20

Answer 1

I always had problemsfactoring, Can you help me.

Answer 2

how do you get that?

Answer 3

yes

Answer 4

x^2+10x+25/ x^2+9x+20
(x+5)(x+5) / (x+5)(x-4) =
x+5/ x - 4
restriction: x cannot be = 4

Answer 5

@Ket-kat can 5 be x?

Answer 6

Yes

Answer 7

how?

Answer 8

well, lets plug in five and see what happens

Answer 9

Oh, So if it =0 then x can't be that number.

Answer 10

x+5/x-4

f(5) = (5) + 5/ (5) - 4
= 10/1
=10

Answer 11

The denominator (the bottom) can NEVER be equal to zero. So whenever you have a fraction, simplify the whole equation; and then set the bottom to equal to zero in order to find your zeros like so:

x+ 5/x-4

x-4=0
x=4
whatever this number is, x CANNOT BE

Answer 12

but the top can be 0 though, right

Answer 13

Yes, unless the problem you're working says otherwise

Answer 14

If the top is = 0, then the answer will ALWAYS be :
UNDEFINED

Answer 15

it's x+4 not minus

Answer 16

so i did it all worng.

Answer 17

If the bottom is = 0 not top

Answer 18

@Ket-kat you messed it up

Answer 19

oops, I'm only human xD young and messy lol

Answer 20

So what would the answer be?

Answer 21

You didn't do it wrong

Answer 22

so the answer would be x doesnt = -4 and -5

Answer 23

well, if you're factoring and then solving for zeros you should be okay (it would be + 4)