Question

What is a restriction on a variable?

Answer 1

Restrictions on a variable are usually either values that cause the bottom of a fraction to equal zero, or values that cause the square root of a negative number. So be sure to NOT include any restricted values in your answers.

Answer 2

I need to solve for x, and find the restrictions on the variable for this equation... I am still confused for this one:
a(x-3)+8 = b(x-1)

I am not trying to make you do my homework fdor me, because I have like 8 of them to do, but if you solved one and showed me your work, I would probably get it better

Answer 3

Distribute

Answer 4

Or wait nvm. Divide

Answer 5

Your not really going to be solving for x if you want to find the domain restrictions

Answer 6

I need to solve for x and find the restrictions
But I am having trouble doing so... i'll show you what i have so far, and where i got stuck

Answer 7

Here's what I got
a = b \[\frac{ x-3 }{ x-2 }\]

Answer 8

Move that up next to b

Answer 9

But I'm trying to solve for x, not a

Answer 10

No, you're trying to find restrictions. Here's a restriction
x-2=0
x=2
that means x\[x \neq 2 \]

Answer 11

thats the restriction because if X is 2, that bottom is 0 and that is like a curse word in math

Answer 12

The instructions say "solve for x and state any restrictions on the variable"

Answer 13

K. Well if they really want you to solve for x, do it. we already have the restriction

Answer 14

2?

Answer 15

What math level are you in anyways? Pre-calculus?

Answer 16

Alegebra 2, one under precalc

Answer 17

algebra

Answer 18

no, you can't get a number for x. There would be no point, because you have to know what a and b are. Assuming that a was y as in a function, we still need a value for b so we can't get x.

Answer 19

And that's pretty impressive if you guys are doing that because I didn't do that till Algebra 2 and Pre-calc this year

Answer 20

oh, you are in Algebra 2. I got the hang of it this year.

Answer 21

Thanks for the help :) I think I have it now, plus, if I spend anymore time on this one question, I'll never get any of my other homework done!

Answer 22

But yeah, unless your teacher just wants you to show that you can solve for x algebraically, then I guess you could do it. other than that it's pretty useless. We already have the restriction.

Answer 23

Here I used this to help me. http://www.coolmath.com/algebra/15-functions/06-finding-the-domain-01.htm

Answer 24

If you guys are doing this, you guys are probably going to be graphing hyperbolas, but idk. Good luck