Question

Hey I need help with this question!!
I have to find the exclusion of 4x^2/4x+2

Answer 1

Hey, quick question. What is 3/0?

Answer 2

0

Answer 3

False. 3/0 is not 0. Why not? Because 0*0 does not give me 3.

Answer 4

ohhh sorry

Answer 5

It's not 3 or 1 or 0 or any of those other things that you might think it is. In fact, there's no answer. Because anything I try to multiply 0 by will give me 0 and not 3. Sadface.

So the lesson to learn is that you just can't divide by 0.

Answer 6

ok

Answer 7

That's an important concept to get to solve any problem like this. Are you convinced? You can't ever ever divide by 0.

Answer 8

YES!!

Answer 9

Cool! So let's look at our function and ask ourselves what x would make me divide by 0.

Answer 10

4x^2/4x+2

Answer 11

If x makes me divide by 0, then I can't say what value Y is at that point. So x would be a restriction.

Your denominator, the thing on the bottom, is 4x+2. What x makes that 0?

Answer 12

im sorry its 4x^2-1/4x+2

Answer 13

That actually isn't going to make a difference here haha
Why? Because only the bottom will give me a restriction. The top is allowed to be anything, as long as the bottom isn't 0.

Answer 14

oh ok