Question

regra do produto notavel calcule : (2x+y)³
com o calculo

Answer 1

= (a + b)³ = a³ + 3a²b + 3ab² + b³ 

= (2x + y)³
= (2x)³ + 3.(2x)².y + 3.2x.y² + y³
= 8x³ + 3.4x²y + 6xy² + y³
= 8x³ + 12x²y + 6xy² + y³

= 8x³ + 12x²y + 6xy² + y³

ou

= (2x + y)².(2x + y)
= (4x² + 2.2xy + y²).(2x + y)
= (4x² + 4xy + y²).(2x + y)
= 8x³ + 4x²y + 8x²y + 2y²x + 4xy² + y³
= 8x³ + 12x²y + 6xy² + y³