Factor completely: 20a7b3 – 10a21b12

Question

anonymous · Answer

Take out the GCF... please let her attempt it...

anonymous · Answer

which is?

parthkohli · Answer

Start out by factoring out the GCF, i.e the multiplication of 10, a^7, b^3

anonymous · Answer

20 and 10, what's common between the two?

anonymous · Answer

7 and 21 
3 and 12

lgbasallote · Answer

hey @ladynisha i have noticed you have been posting consecutive questions without even replying..please interact with the answerers so you can learn. ~Thanks

parthkohli · Answer

The multiplication of all common factors is the GCF

anonymous · Answer

yup @lgbasallote :).

parthkohli · Answer

@lgbasallote she will learn only if you have an approach to teach UNBIASED. Also respect the fellow members on OS.

anonymous · Answer

I AM STILL HAVING HARD TIME

anonymous · Answer

That's okay. Don't be afraid to tell us we will understand :).

anonymous · Answer

$$-10 a^7 b^3 (-2+a^14 b^9) $$

anonymous · Answer

You can multiply the terms out to check you answer or divide the original by the common factor so -10a^7b^3*-2=-20a^7b^3. Are you able to do the next one ladynisha?

anonymous · Answer

and my apologies that is...$$-10 a^7 b^3 (-2+a^{14} b^9)$$