Mathematics
25 Online
OpenStudy (howard-wolowitz):
Check plz! I got B.
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OpenStudy (howard-wolowitz):
You may need to zoom in!
OpenStudy (anonymous):
what?
OpenStudy (triciaal):
did you find the factors of each
only use the common factor once and multiply the factors to get the Least common multiple
OpenStudy (howard-wolowitz):
yea
OpenStudy (triciaal):
do it again
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OpenStudy (howard-wolowitz):
well if B is wrong then....
OpenStudy (howard-wolowitz):
I dont know cause I cant work it
OpenStudy (triciaal):
yes you can do it
take your time and pay attention to the signs
OpenStudy (howard-wolowitz):
no imean i cant i dont have a pencil or pen
OpenStudy (triciaal):
factor each quadratic
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OpenStudy (howard-wolowitz):
ok one sec
OpenStudy (triciaal):
start with the one ending with 3 (x + 3) is a factor
OpenStudy (howard-wolowitz):
ok im doing it IM DOING ITTTTT YEA
OpenStudy (triciaal):
think, how do you get from 3 to 2?
OpenStudy (triciaal):
you would -1 so (x-1 Is the other factor
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OpenStudy (howard-wolowitz):
probaly -1
OpenStudy (triciaal):
look at the other quadratic ends in 15
know factors of 15 include 3 other factor 5
watch the signs
what is the other factor?
OpenStudy (howard-wolowitz):
-1
OpenStudy (triciaal):
to get the LCM (x+3) is the common factor so only use once
OpenStudy (howard-wolowitz):
so 3x
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OpenStudy (triciaal):
reread the thread
OpenStudy (howard-wolowitz):
i dont know
OpenStudy (triciaal):
do you see the factors of are (x+3)(x-1)
OpenStudy (howard-wolowitz):
yes
OpenStudy (triciaal):
for the other what are the factors
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OpenStudy (howard-wolowitz):
-2x+15
OpenStudy (triciaal):
repost
look at the other quadratic ends in 15
know factors of 15 include 3 other factor 5
watch the signs
what is the other factor?
OpenStudy (triciaal):
x^2 -2 x -15 = (x + 3)(x-5) do you agree?
OpenStudy (howard-wolowitz):
yes i agree
OpenStudy (triciaal):
so you are finding the LCM of
(x+3)(x-5) and (x +3)(x-1)
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OpenStudy (howard-wolowitz):
ok
OpenStudy (triciaal):
see why I got D ?
OpenStudy (howard-wolowitz):
but you have two x+3
OpenStudy (triciaal):
you only use once because you want the lowest multiple
(x + 3) is a common factor
OpenStudy (triciaal):
example 3, 6 and 12 what would be the LCM?
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OpenStudy (triciaal):
example 6 and 18 the lcm = 18
OpenStudy (triciaal):
do you understand now?
OpenStudy (howard-wolowitz):
yes