Respuesta:
mn = 20
Explicación paso a paso:
cuadrado m + n = 7
(m + n)² = 7²
m² + 2mn + n² = 49
m² + n² + 2mn = 49
mas m² + n² = 9
9 + 2mn = 49
2mn = 49 - 9
2mn = 40
mn = 40 : 2
" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
Respuesta:
mn = 20
Explicación paso a paso:
cuadrado m + n = 7
(m + n)² = 7²
m² + 2mn + n² = 49
m² + n² + 2mn = 49
mas m² + n² = 9
9 + 2mn = 49
2mn = 49 - 9
2mn = 40
mn = 40 : 2
mn = 20