Respuesta :

Answer: 10

Step-by-step explanation:

Answer:

x = 10 and -10

Step-by-step explanation:

10x^2 +1 = 1001

Subtract one from each side

10x^2 = 1000

Divide 10 on each side

x^2 = 100

Take the square root on each side

x = 10 and -10