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SAT Math: Factoring a Quadratic Equation and Recognizing Undefined Values 1 Views
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Description:
In the equation above, at what x-value(s) is y undefined?
Transcript
- 00:00
Yeah Whoa Okay Mash bumpers last in this series of
- 00:06
weird equation ville in the equation above at what X
- 00:09
values is Why undefined Okay so clearly they're looking at
- 00:16
this thing X squared minus X minus twelve How does
- 00:19
that equal Zero And if it does Well then why
Full Transcript
- 00:22
has got to be in the find Right Well when
- 00:24
faced with a quadratic equation instincts tell us to fact
- 00:27
door when faced with two quadratic ce a factor even
- 00:30
more when they're stacked on top of each other like
- 00:33
some kind of quadratic jenga factor Like your life depended
- 00:36
on it Let's just do that So we've got top
- 00:39
thing Expert Police State actually fifteen That's X plus three
- 00:42
and explode Five there in the bottom thing And we've
- 00:44
got to be for a foreign three So Yeah X
- 00:46
plus three and the next minus four So why is
- 00:49
undefined whenever the denominator is equal to zero So that
- 00:53
means when X is negative Three And when X is
- 00:56
for the denominator is here and the problem is undefined
- 01:00
So that's it Goodbye plan
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