Question

a) 2x^2 - 5= 67
b) (2x – 1)^3 = - 125

Answer 1

Respuesta:

2x² - 5 = 67

2x² = 67 + 5

2x² = 72

 x² = 72/2

 x² = 36

 solucion: "x = 6" ó "x = - 6".

(2x - 1)³ = - 125

(2x - 1)³ = (- 5)³    

2x - 1 = - 5

2x = - 5 + 1

2x = - 4

x = - 4/2

x = - 2

solucion: {- 2}

me das la coronita

Answer 2

Respuesta:

A)2x² - 5 = 67

2x² = 67 + 5

2x² = 72

 x² = 72/2

 x² = 36

x=6

B)(2x - 1)³ = - 125

(2x - 1)³ = (- 5)³  

2x - 1 = - 5

2x = - 5 + 1

2x = - 4

x = - 4/2

x = - 2

Explicación paso a paso: