Delete
Share
This Question is Closed

Mertsj

Best Response

You've already chosen the best response.

1
What do those two terms have in common?

abb0t

Best Response

You've already chosen the best response.

0
\[3x^2(x^2-4)=3x^2(x+a)(x-a)\]

evy15

Best Response

You've already chosen the best response.

0
3x^2

Mertsj

Best Response

You've already chosen the best response.

1
So you need to factor out 3x^2

evy15

Best Response

You've already chosen the best response.

0
I did

Mertsj

Best Response

You've already chosen the best response.

1
What is the other factor?

evy15

Best Response

You've already chosen the best response.

0
x^4-4

Mertsj

Best Response

You've already chosen the best response.

1
|dw:1359238787009:dw|

evy15

Best Response

You've already chosen the best response.

0
Yup thats what i got

Mertsj

Best Response

You've already chosen the best response.

1
If you multiply that, using the distributive property, do you get 3x^4-12x^2?

evy15

Best Response

You've already chosen the best response.

0
Nope

Mertsj

Best Response

You've already chosen the best response.

1
Then that can't be correct. It would be like me saying that the factors of 8 are 3 and 9. You would say that's not right because 3 time 9 is not 8. And you would be right.

Mertsj

Best Response

You've already chosen the best response.

1
So you have to write factors that multiply back to 3x^4-12x^2

evy15

Best Response

You've already chosen the best response.

0
3x^2(x-2)(x+2)

Mertsj

Best Response

You've already chosen the best response.

1
Very good!!

evy15

Best Response

You've already chosen the best response.

0
Thanks for the help!

Mertsj

Best Response

You've already chosen the best response.

1
yw