Math problem help please?

2009-04-01 8:19 am

a^3+b^3+a+b

Please help and show each step and explain its concept and reasons. Thanks so much.

更新1:

answer comes out to be (a+b)(a^2-ab+b^2+1) idk how it gets to that though please explain.

回答 (2)

2009-04-01 11:48 am

✔ 最佳答案

a^3 + b^3 + a + b
= (a^3 + b^3) + (a + b)
= (a + b)(a^2 - ab + b^2) + (a + b)
= (a + b)[(a^2 - ab + b^2) + 1]
= (a + b)(a^2 - ab + b^2 + 1)

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2009-04-01 6:35 pm

Why don't you mention what is to be done with the expression? What exactly is the "problem"?

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