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GED Math 5.4 Expression and Equations 252 Views


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Description:

GED Math 5.4 Expression and Equations. Which of the following answer choices correctly solves for x with the quadratic formula?

Language:
English Language

Transcript

00:00

Thank you We sneak in and here's your smoked cheese

00:04

You were brought to you by the quadratic formula it's

00:07

quadratic systematic hydra matic and it's hardly a watch grease

00:12

last night All right five x minus one minus three

00:15

expert equals seven And which of the following answers choices

00:17

correctly solved for acts with the quadratic formula And here

00:21

the potential answers So quadratic formula how do we love

00:28

the let us count the ways one okay Yeah we're

00:31

done counting well if we're going to do anything with

00:34

quadratic formula we always need our equation to be set

00:37

equals zero so let's do that for wei take five

00:40

x minus one minus three x squared equals seven subtract

00:43

seven from both sides and get five Acts minus 8

00:47

minus 3 x squared equals zero also it's going to

00:49

cause far fewer headaches if you put this thing in

00:51

order of descending terms so let's rewrite it as negative

00:54

three x squared plus five x minus eight equals zero's

00:57

like that and we know that minus three is are

00:59

a coefficient five is our vehicle efficient and negative eight

01:03

is our sea coefficient if you have the quadratic formula

01:06

memorize on boy we sure hope you do Then we

01:09

can just plug in our coefficients and it'll give us

01:11

x equals negative five plus or minus the square root

01:16

of five squared minus four times negative three times negative

01:21

eight all over two times negative three when we don't

01:24

even have to simplify all that nonsense because we already

01:26

have an exact match for that in our answer choice

01:29

which is a almost looks good enough to eat doesn't 00:01:31.854 --> [endTime] it

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