Respuesta :

kgarciajesus

Answer:

Since both terms are perfect squares, factor using the difference of squares formula,  

a

2

−

b

2

=

(

a

+

b

)

(

a

−

b

)

where  

a

=

k

2

and  

b

=

1

.

9

(

−

36

k

6

+

k

5

−

k

−

2

)

hokpich069
The GCF is -3k^4
-30k^6+9k^5-21k^4= -3k^4(10k^2-3k+7)

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good job