Question

Como eu resolvo esse exc 17?

Answer 1

$a^{9} + b^{9} =(a+b)(a^2+ab+b^2)( a^{6} - a^{3}b^3+b^6)$

$a^9-b^9=(a-b)(a^2+ab+b^2)(a^6+a^3b^3+b^6)$