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Numbers and Operations Videos 64 videos

SAT Math 3.2 Numbers and Operations
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SAT Math 3.2 Numbers and Operations

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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

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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