Question

Which of the following are solutions to the equation below ? 2x^2+18=20

Answer 1

Answer:x=±1

Step-by-step explanation:

1 Subtract 1818 from both sides.

2{x}^{2}=20-182x

​2

​​ =20−18

2 Simplify  20-1820−18  to  22.

2{x}^{2}=22x

​2

​​ =2

3 Divide both sides by 22.

{x}^{2}=1x

​2

​​ =1

4 Take the square root of both sides.

x=\pm \sqrt{1}x=±√

​1

5 Simplify  \sqrt{1}√

​1

​​   to  11.

x=\pm 1x=±1

Done

Answer 2

Answer:

there is no A B C or D