Zapisz za pomocąsum algebraicznych wyrażenie :
... = x³ - ax² + a²x + ax² - a²x + a³ = x³ + a³
(x+a)(x²-ax+a²)=x³ - ax² + a²x + ax² - a²x + a³ = x³ + a³
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... = x³ - ax² + a²x + ax² - a²x + a³ = x³ + a³
(x+a)(x²-ax+a²)=x³ - ax² + a²x + ax² - a²x + a³ = x³ + a³