" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
a + b = 11
ab = 20
Aplicamos binomio al cuadrado.
(a + b)² = a² + 2ab + b²
..........................................................
(a + b)² = (11)²
a² + 2ab + b² = 121
a² + b² + 2(20) = 121
a² + b² + 40 = 121
a² + b² = 121 - 40
a² + b² = 81
Respuesta.
9