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What do you need?

sorry I just found this.

No worries! :D

How do I find the domain

hi

domain is all real numbers except for -5

No division by zero. So what is x going to be when the denominator is zero?

set the denominator equal to zero right? @Akshay_Budhkar

no. x cannot = -5.

Yes @sai

@saifoo.khan

f(x)=3x-8 over 4x+20

@denise9423 Domain means all of the values x can take on.
Here's your domain:
\[x \neq-5\]

can you show me how to get 5

4x+20 =0
Solve for x.
x=-5.

Do you know why division by zero is not allowed?

ok,then can i sub it also 3x-8

no!

you only need to worry about the bottom.

no to ur question
ok

If you have an equation in the denominator, then set that equal to zero :-)

*and solve for x.

like this 4x+20=0

Yup! :-)

ok

ok so -7xyy over 28xxxxxy=0

Are you in algebra?

yes and Its rough

That's okay!

I don't think they'll ask you to find the domain of something with x's and y's. Or are they?

yes

no sorry

simplify

-7xyy/28xxxxxy

Okay well what multiples to 7 and 8 have in common? What can you divide them both by?

I mean 28.

yes it does bc it will help me remember to put=0 so I can solve for x

good :-)

3x7=28

no 4x7=28

bottom has 5 x's and the top has 2 y's

ok

sorry i have a 911 gotta chk out b back later thank you for all ur help god bless