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Linear Inequalities Videos 13 videos

Graphing Linear Inequalities on a Coordinate Plane
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SAT Math 8.4 Algebra and Functions 182 Views


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SAT Math 8.4 Algebra and Functions

Language:
English Language

Transcript

00:02

Here's your shmoop du jour, brought to you by the Square Root Symbol.

00:06

Not to be confused with the Square Root Beer Symbol.

00:13

If 2 times the quantity 3x + 4 = -16,

00:16

then the square root of x squared is equal to what?

00:23

We need to start by getting x by itself in the first equation...

00:27

We can divide both sides of the equation by 2 to get 3x + 4 = -8.

00:34

Subtract 4 from both sides... 3x = -12.

00:39

Divide both sides by 3 and we have x = -4.

00:43

Now, we can plug -4 into the second equation...

00:46

The square root of -4 squared is the same as the square root of 16...

00:50

which is just 4. So we have our answer.

00:53

That's using our head.

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