Question

Solve the following equation using any method of your choosing: 2x² +1 = 19

Answer 1

x = 3

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.

`√(9)` = 3

x = 3

Hope this helps :D

Answer 2

X=3

Explanation:

2
`x^(2)`+1=19

2
`x^(2)`=18 < subtract both sides by 1

`x^(2)`=9 < divide both sides by 2

x=
`√(9)` < square root both sides

x= 3

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