if a + b is equals to 2 find a cube plus b cube
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a + b = 2
So, (a+b)² = 4
a² + 2ab + b² = 4
a² + b² = 4 - 2ab
a³ + b³ = (a+b)(a² -ab + b²) = 2(4 - 2ab) = 8 - 4ab
So, (a+b)² = 4
a² + 2ab + b² = 4
a² + b² = 4 - 2ab
a³ + b³ = (a+b)(a² -ab + b²) = 2(4 - 2ab) = 8 - 4ab
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