Respuesta :

Answer:

X=3

Step-by-step explanation:

2[tex]x^{2}[/tex]+1=19

2[tex]x^{2}[/tex]=18   < subtract both sides by 1

[tex]x^{2}[/tex]=9    < divide both sides by 2

x=[tex]\sqrt{9}[/tex]  < square root both sides

x= 3

You subtract the 1 and divide by 2 to isolate the variable.

tlbi

Answer:

x = 3

Step-by-step explanation:

2x² + 1 = 19

Eliminate the 1 by subtracting to both sides.

2x² = 18

Eliminate 2 by dividing both sides by 2.

x² = 9

Square root 9.

[tex]\sqrt{9}[/tex] = 3

x = 3

Hope this helps :D

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