Respuestas
Respuesta:
En algunas hay dos soluciones
e) x₁ = 11 ; x₂ = 1
f) x₁ = 7 ; x₂ = - 1
g) x = 30
h) x = - 23/8
Explicación paso a paso:
e) 4 ( x - 6 )² = 100
( x - 6 )² = 100/4
x² - 12x + 36 = 25
x² - 12x + 36 - 25 = 0
x² - 12x + 11 = 0
resolvemos por factorización
( x - 11 ) ( x - 1 ) = 0
igualamos a cero cada factor y resolvemos
x - 11 = 0
x₁ = 11
x - 1 = 0
x₂ = 1
f) 2 + ( x - 3 )² = 18
( x - 3 )² = 18 - 2
x² - 6x + 9 = 16
x² - 6x + 9 - 16 = 0
x² - 6x - 7 = 0
factorizamos
( x - 7 ) ( x + 1 ) = 0
x - 7 = 0
x₁ = 7
x + 1 = 0
x₂ = - 1
g) 2 + 4 √ x + 6 = 26
√ x + 6 = 26 - 2 / 4
√ x + 6 = 24/4
√ x + 6 = 6
( √ x + 6 )² = 6²
x + 6 = 36
x = 36 - 6
x = 30
h) 3 + 2³ ∛ x + 3 = 7
∛ x + 3 = 7 - 3 / 2³
∛ x + 3 = 4/8 ojo : 4/8 = 1/2
( ∛ x + 3 )³ = ( 1/2 )³
x + 3 = 1/8
x = 1/8 - 3
x = 1/8 - 24/8
x = - 23/8