Posted by **Isabel** on Monday, October 30, 2006 at 7:44pm.

How can you factor?

x^6+y^6

That expression cannot be factored further because the bases of the exponents are different.

so it's prime...Thank you.

Can you please help me with this one?

50x^2 - 2y^2 - 4yz - 2z^2

I tried doing it but I get very confused.

thanks.

Is it 2(5x+y-z)(5x-y+z)?

thats wrong. the answer is 2(5x - y -z)(5x + y + z)