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GED Math 1.4 Graphs and Functions 2274 Views


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Description:

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

Language:
English Language

Transcript

00:00

Thank you We sneak in and here's your shmoop du

00:05

jour brought to you by the function of acts Ironically

00:08

excess family is pretty dysfunctional All right Well given that

00:14

f of ax equals the square root of five x

00:16

plus fifteen select a point on the graph below Where

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

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