GED Math 1.4 Graphs and Functions

GED Math 1.4 Graphs and Functions. On which point on the graph is f(x) equal to 0?

AlgebraCoordinates and Graphs
GED MathGraphs and Functions
LanguageEnglish Language
Skill Area 4Graphs and Functions (Algebraic)
Systems of EquationsLinear and Nonlinear Equations

Transcript

00:20

f of x is equal to zero parentless that's where

00:24

this thing he added up Root of five zero Where

00:28

is a hero All right so this question asked us

00:32

to take a function and figure out where that function

00:35

will be Nothing Nada zero cochin opened eyes on the

00:39

prize We got this way Want fx to be zero

00:42

Then we can replace the fx with zero to get

00:46

the equation Zero equals the square root of five x

00:49

plus fifteen Well if we square both sides we get

00:53

still zero over here and over here we get just

00:56

five x plus fifteen Well subtract fifteen from both sides

01:01

to get the negative Fifteen equals five x then divide

01:06

both sides by five Get x equals negative three so

01:12

that's our x coordinate Negative three But what about our

01:15

y coordinate Well since f of negative three equals zero

01:21

the point we're looking for must be negative Three zero

01:24

on this guy right here is the white corner though

01:26

Three units left along the x axis and that's It

01:29

there's our point Now all we have to do is

01:31

get ex out of that questionable living environment and everything 00:01:34.218 --> [endTime] will be just hunky dorey