factor out the greatest common factor. 2x^2y+6x^2y^2-16xy
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OpenStudy (cwrw238):
first find GCF of 2, 6 and 16
can you do that?
OpenStudy (anonymous):
it's 2 right?
OpenStudy (anonymous):
ac
OpenStudy (anonymous):
no 6
OpenStudy (cwrw238):
no it 2 - the greatest number that will divide into 2 6 and 16
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OpenStudy (anonymous):
which is 2 right?
OpenStudy (cwrw238):
now find GCF for terms in x and terms in y
GCF of x^2, x^2 and x
and
GCF of y and y^2
OpenStudy (cwrw238):
2 is right yes
OpenStudy (anonymous):
that is where i get confused at
OpenStudy (cwrw238):
GCF of x^2 and x is easy
write them as x*x and x
- it must be x right?
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OpenStudy (anonymous):
yes
OpenStudy (cwrw238):
x * x and x
- the factor common to both is x
OpenStudy (cwrw238):
same with y^2 and y
- gotta be y
OpenStudy (cwrw238):
so GCF we are looking for is 2xy
OpenStudy (anonymous):
2xy is going to be my answer right?
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OpenStudy (anonymous):
?
OpenStudy (cwrw238):
no you need to factor the expression now
divide 2xy into
2x^2y+6x^2y^2-16xy
ill start you off : 2x^2 y / 2xy = x
so we get
2xy( x + - )
- try filling in the blanks
OpenStudy (anonymous):
4-2? maybe. im not sure
OpenStudy (anonymous):
i just suck lol
OpenStudy (anonymous):
u still there?
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OpenStudy (amtran_bus):
Hi. Listen, have an I can do it attitude! 2 is the largest number that will go into the function so we will factor it out. Is there supposed to be a + or - sign after 2x^2 though?
OpenStudy (anonymous):
nope it's just y then there is a + sign
OpenStudy (amtran_bus):
Oh well. So, what number will go into all of them evenly? Could a variable go into them each also? Tell me.
OpenStudy (cwrw238):
6x^2y^2 / 2xy = 3xy
OpenStudy (cwrw238):
and 16xy / 2xy = 8
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OpenStudy (anonymous):
so the answer is 8xy
OpenStudy (anonymous):
?
OpenStudy (cwrw238):
no what goes in the brackets is the result of dividing the whole expression by 2xy and 2xy is outside the brackets
OpenStudy (anonymous):
Ok u lost me
OpenStudy (cwrw238):
2x^2y+6x^2y^2-16xy = 2xy(x + 3xy - 8)
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