How do I find the GCF's of these following problems...
1) 36, 81, 27
2) 15, 17, 30
3) 3x^2y, 9x^2
4) 8a^2b, 14ab^2
%) 3cd^4, 12c^3d, 6c^2d^2
8 answers
http://www.jiskha.com/display.cgi?id=1447869016
17 is a prime number. You can do nothing here
Now you try
I already know 1 and 2...but I am so confused on how to do the last three :/
5.
3 * c * d * d * d *d
4 * 3 * c * c * c * d
2 * 3 * c * c * d * d
they all have 3
they all have c
they all have d
so
3 c d
3 * c * d * d * d *d
4 * 3 * c * c * c * d
2 * 3 * c * c * d * d
they all have 3
they all have c
they all have d
so
3 c d
ooooohhhh okay....I think I'm starting to understand it a little more.
So would #3 be 6xy?
So would #3 be 6xy?
3 would be 3 x^2
3) 3x^2y, 9x^2
3 * x * x * y
and
3 * 3 * x * x
3*x*x is common to both
3) 3x^2y, 9x^2
3 * x * x * y
and
3 * 3 * x * x
3*x*x is common to both
ugh! Okay let me try again...#4
8a^2b= 2*4*a*a*b
14ab^2= 2*7*a*b*b
They both have 2 in common
They both have a in common
They both have b in common
So....
2ab?
8a^2b= 2*4*a*a*b
14ab^2= 2*7*a*b*b
They both have 2 in common
They both have a in common
They both have b in common
So....
2ab?
1 answer