Question 469044
The first way:
{{{(a + b)(a^2 - ab + b^2)=a*a^2-a*ab+a*b^2+b*a^2-b*ab+b*b^2=a^3-a^2b+ab^2+a^2b-ab^2+b^3=a^3+b^3}}}
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The second way:
Use the formula {{{(a + b)(a^2 - ab + b^2)=a^3+b^3}}}