[tex]\log _2\left(x^2-8\right)=3[/tex]
[tex]\log _2\left(x^2-8\right)=3\Longrightarrow\:x^2-8=2^3\\\\x^2-8=2^3\\\\x^2-8=8[/tex]
Resolvemos:
Pasamos el 8 que está negativo, hacia el otro lado de forma positiva.
[tex]x^2=8+8\\\\x^2=16[/tex]
Ahora:
[tex]x=\sqrt{16},\:x=-\sqrt{16}[/tex]
[tex]\bf{\sqrt{16}=\sqrt{4^2} =4}[/tex]
[tex]\bf{-\sqrt{16}=\sqrt{4^2}=4=-4}[/tex]
[tex]\boxed{x=4,\:x=-4}[/tex]
MUCHA SUERTE...
" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
RESOLVER:
[tex]\log _2\left(x^2-8\right)=3[/tex]
[tex]\log _2\left(x^2-8\right)=3\Longrightarrow\:x^2-8=2^3\\\\x^2-8=2^3\\\\x^2-8=8[/tex]
Resolvemos:
Pasamos el 8 que está negativo, hacia el otro lado de forma positiva.
[tex]x^2=8+8\\\\x^2=16[/tex]
Ahora:
[tex]x=\sqrt{16},\:x=-\sqrt{16}[/tex]
[tex]\bf{\sqrt{16}=\sqrt{4^2} =4}[/tex]
[tex]\bf{-\sqrt{16}=\sqrt{4^2}=4=-4}[/tex]
[tex]\boxed{x=4,\:x=-4}[/tex]
MUCHA SUERTE...