Respuesta :

reinhard10158

Step-by-step explanation:

really ? you need help here ... - that means you did not even look at it once ...

a = 2 - sqrt(5)/2 + sqrt(5)

b = 2 + sqrt(5)/2 - sqrt(5)

a + b = 2 + 2 = 4 (the rest add up to 0)

(a+b)³ = 4³ = 64

Answer:

64

Step-by-step explanation:

Given :

  • a = 2 - √5/2 + √5
  • b = 2 + √5/2 - √5

Evaluating (a + b)³ :

  • (2 - √5/2 + √5 + 2 + √5/2 - √5)³
  • (2 + 2 - √5/2 + √5/2 + √5 - √5)³
  • (4)³
  • 64

Otras preguntas