a^3+b^3

-----------

a + b

Answer is supposed to be

a^2 - (ab) + b^2

Can anyone explain how to solve this?

a^3+b^3

-----------

a + b

Answer is supposed to be

a^2 - (ab) + b^2

Can anyone explain how to solve this?

-----------

a + b

Answer is supposed to be

a^2 - (ab) + b^2

Can anyone explain how to solve this?

A few good teachers supplied by Google:

https://www.google.ca/?gws_rd=ssl#q=fac ... +%2B+b%5E3

https://www.google.ca/?gws_rd=ssl#q=fac ... +%2B+b%5E3

They're expecting you to remember the special-factoring formula for the sum or difference of cubes. You can find those here. If you apply the sum-of-cubes formula to the top, then you'll get a factor that cancels with the bottom. What's left is what they gave you as the answer.

Answer is supposed to be

Can anyone explain how to solve this?

Thanks!!!

They're expecting you to remember the special-factoring formula for the sum or difference of cubes. You can find those here. If you apply the sum-of-cubes formula to the top, then you'll get a factor that cancels with the bottom. What's left is what they gave you as the answer.

Answer is supposed to be

Can anyone explain how to solve this?