ShmoopTube

Where Monty Python meets your 10th grade teacher.

Search Thousands of Shmoop Videos

GED Math 5.4 Expression and Equations 252 Views


Share It!


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

Up Next

GED Math 5.5 Graphs and Functions
882 Views

GED Math: Graphs and Functions Drill 5, Problem 5. What is the value of a?

Related Videos

GED Math 1.1 Measurement
327 Views

GED Math: Measurement Drill 1, Problem 1. The area, in square inches, of the shaded region where the two rectangles overlap is...what?

GED Math 1.1 Graphs and Functions
11928 Views

GED Math 1.1 Graphs and Functions. Which is the appropriate region of the coordinate plane?

GED Math 1.1 Expressions and Equations
878 Views

GED Math: Expression and Equations Drill 1, Problem 1. How much do the apples cost after tax?

Simplifying Radicals
9741 Views

We don't like knocking people down to size, but we do like simplifying radicals. Join us?