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GED Math: Expression and Equations Drill 3, Problem 5. Which part of the equation should be changed?
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GED Math 3.5 Expression and Equations 2965 Views
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Description:
GED Math: Expression and Equations Drill 3, Problem 5. Which part of the equation should be changed?
Transcript
- 00:00
Thank you We sneak in and here's your shmoop choose
- 00:05
your brought to you by problems involving positive and negative
- 00:09
signs Well we bet you're pregnant with anticipation Exactly One
- 00:15
of the positive or negative signs in the following equation
- 00:18
is incorrect changing I don't like the equation True which
Full Transcript
- 00:22
one should be changed Here we go let's read x
- 00:25
squared months eight x minus fifteen equals quantity x minus
- 00:29
three times the quantity x minus five Okay so there
- 00:34
are four minus signs in the equation given and we're
- 00:36
told that exactly one of them is an imposter and
- 00:39
needs to be changed to a plus sign We've got
- 00:42
our people at the fbi on this one but so
- 00:44
far they've come up with nothing anyway Let's take a
- 00:46
look at the right half the equation for a if
- 00:48
we made either those signs positive we'd still get our
- 00:51
x square to me outside terms and come out to
- 00:53
negative fifteen which is good but we'd have either three
- 00:57
x minus five Acts or 5 x minus 3 x
- 01:01
and neither of those would get us to a negative
- 01:02
eight acts which is what shows up on the left
- 01:05
Hand side of the equation So no dice However if
- 01:08
we leave those signs alone then our outside terms are
- 01:11
going to result in a positive fifteen which is not
- 01:14
what we have going on here What does that tell
- 01:16
us Well it basically tells us that we need to
- 01:18
change the sign in front of the fifteen to a
- 01:21
plus sign and now everything works out just perfectly Our
- 01:24
imposter has been apprehended really the low brimmed hat shades 00:01:27.729 --> [endTime] should've thought
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