Find the GCF of –15x^9 y^3; 35x^3 y^5; and 63z^2 x^9 y.

A. 315z^2 x^9 y^5

B. –15z^2 x^3 y

C. x^3y

D. 63x^3 y

Question

Find the GCF of –15x^9 y^3; 35x^3 y^5; and 63z^2 x^9 y.

A. 315z^2 x^9 y^5

B. –15z^2 x^3 y

C. x^3y

D. 63x^3 y

anonymous · Answer

Is B the correct answer?

anonymous · Answer

my answer is -x^3y but i'm not sure. Let me recheck it

anonymous · Answer

is c. x^3y ?

anonymous · Answer

@RH  still there?

directrix · Answer

Greatest Common Factor

The highest number that divides exactly into two or more numbers. 
 It is the "greatest" thing for simplifying fractions!

anonymous · Answer

yes yes I am here. so x^3y is the answer?

goldphenoix · Answer

bless, explain to him how you got your answer.

anonymous · Answer

her*. Yes if you don't mind!

directrix · Answer

@RH The x^3 y part is correct but what about the greatest common factor of -15, 35, and 63 ?

goldphenoix · Answer

Oh. Typo these days...

anonymous · Answer

w8 sorry i got lag

anonymous · Answer

@Directrix I don't know:( sorry...

anonymous · Answer

Well, first factor out the GCF of -x^3y from each term in the polynomial.
-x^3y(15x^6y^2) ; -x^3y(-35y^4); -x^3y(-63x^6z^2)

directrix · Answer

@RH  > so x^3y is the answer?  YES

Yes, that is correct. I messed up and thought the numerical coefficients had a common factor of 3 but they do not.

anonymous · Answer

no worries @Directrix thanks a lot!!

directrix · Answer

Alrighty, then. @RH