00:03
In this problem, we're working with the expression of x squared plus 4 over 2x plus 4.
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Our first goal is to figure out the values that need to be excluded.
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And we know the denominator can't be 0.
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Why is that? well, we can never divide by 0.
00:28
So in order to find these excluded values, what we can do is set the denominator equal to 0.
00:35
We need to solve for x.
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So what is our first step? subtract 4 from both sides.
00:43
This leaves us with 2x equals negative 4.
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After dividing by 2, we need to exclude the value x equals negative 2.
00:59
So that's the first half of our problem.
01:05
The second half of our problem is to think about simplifying or writing this original expression in lowest terms.
01:13
And in order to simplify, remember, we're factoring out...