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Mathematics 25 Online
OpenStudy (howard-wolowitz):

Check plz! I got B.

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

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

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

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

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

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)

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?

OpenStudy (triciaal):

example 6 and 18 the lcm = 18

OpenStudy (triciaal):

do you understand now?

OpenStudy (howard-wolowitz):

yes

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