00:01
We're going to take this minute to talk about different ways of writing fractions when they have variables.
00:10
When a variable is being multiplied by a fraction, there's different ways you can write it.
00:17
For example, if i'm multiplying x by the fraction a over b, i can write it a over b times x.
00:27
I can also write it as a x over b.
00:30
And the reason that is, i can also write it as a x over b.
00:32
And the reason the reason why that works is, if i have a fraction of a over b times x, well, another way of writing x is x over 1.
00:48
And so when i simplify that, that would be a times x.
00:53
Now you can't multiply the exponent by the denominator.
00:57
You can only multiply it by the numerator.
01:00
So let's look at the rules over here to see which these are true or false.
01:05
So first we have one half x equals x over two.
01:10
Well, remember that this x in the second part, there is a one written in front of it, an imaginary one.
01:18
So this is saying that we're multiplying my numerator times the x.
01:23
This one is true because that is another way of writing the fraction.
01:28
B is very similar...