Question

Hola necesito ayuda para resolver la siguiente ecuación
8x⁴-x²-7=0
Gracias :)

Answer 1

Answer:

question samajh nii aya

Answer 2

Step-by-step explanation:

Given Hola necesito ayuda para resolver la siguiente ecuación

8x⁴-x²-7=0

Given Hi, I need help solving the following equation.

8x⁴-x²-7 = 0

• Now the given equation is 8x^4 – x^2 – 7 = 0
• Now put u = x^2 we get
• 8u^2 – u – 7 = 0
• 8u^2 – 8u + 7u – 7 = 0
• 8u(u – 1) + 7(u – 1) = 0
• (u – 1)(8u + 7) = 0
• So u = 1, 8u = - 7
•            Or u = -7/8
• Now u = x^2        
•  So x^2 = 1  or x^2 = - 7/8
• Or x = + - 1  or x = + -√7/8