(a + b)³ = a³ - b³ + 3a²b - 3ab²
--> (x - ½)³ = x³ - 1/8 + (3x²)/2 - 3x/4
Respuesta:
x³ -3/2x² + 3/4x - 1/8
Explicación paso a paso:
( a - b)³ = a³ + 3a²b + 3a.b² + b³
(X-½)³ = x³ + 3x².(-1/2) +3x.(-1/2)²+ (-1/2)³
(X-½)³ = x³ -3/2x² + 3x.(1/4) - 1/8
(X-½)³ = x³ -3/2x² + 3/4x - 1/8
