Answer:
3
Step-by-step explanation:
[tex]2x^{2} = 18\\ => x^{2} = \frac{18}{2} =9\\ => x = \sqrt{9} = 3[/tex]
Hope u'll like it.....
2x²=18
x²=18/2
x²=9
squaring both sides
and we get
x=3
