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Aplicamos binomio al cuadrado.
(a + b)² = a² + 2ab + b²
............................................
(a + b)² = (1)²
a² + 2ab + b² = 1
a² + 2(1) + b² = 1
a² + b² = - 1
Y nos piden hallar :
a² b² - 1
------- + --------- = -------- = a) - 1
b a 1
Tenemos los valores "ab = 1".
Y a² + b² = - 1
Solamente reemplazamos.
(a + b)² = (1)²
a² + 2ab + b² = 1
a² + 2(1) + b² = 1
a² + b² = - 1
a² b² - 1
------- + --------- = ---------- = a) - 1
b a 1
ab = 1.
a² + b² = - 1