Respuesta:
-4
Explicación paso a paso:
(a + 3)(a + 7) =a (a + 3)-7
[tex]a^{2} + 10a + 21\\[/tex] = [tex]a^{2} + 3a - 7[/tex]
7a = -28
a = -28/7
a= -4
" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
Respuesta:
-4
Explicación paso a paso:
(a + 3)(a + 7) =a (a + 3)-7
[tex]a^{2} + 10a + 21\\[/tex] = [tex]a^{2} + 3a - 7[/tex]
7a = -28
a = -28/7
a= -4