I feel like it’s 48, but I’m scared it’s wrong! Affirmation ?

Answer:
its 30 :/
Step-by-step explanation:
so we simplify
x(2x) = 1800
2[tex]x^{2}[/tex] = 1800
divide by 2 on both sides
[tex]x^{2}[/tex] = 900
find the square root of both sides
[tex]\sqrt x^{2} = \sqrt{900}[/tex]
x = 30