Si : A+B =raiz de 5
ab=3
clacular :a al cuadrado + b al cuadrado
ab=3
clacular :a al cuadrado + b al cuadrado
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(a + b)² = a² + 2ab + b² Donde a + b = √5 y ab = 3
(√5)² = a² + 2 * 3 + b²
5 = a² + 6 + b²
5 - 6 = a² + b²
- 1 = a² + b²
Respuesta.
a² + b² = - 1