Question

need help simplifying... u=x^2
2u+3=0

Answer 1

\[2x^2+3=0\]

Answer 2

so far i have...
2u=-3
u=-3/2
x^2 = -3/2
\[x=\pm \sqrt{-3/2}\]

Answer 3

\[2x^2=-3\]
\[x^2=-3/2\]
\[x=\sqrt{-1\times 3/2}\]
\[x=\sqrt{\small{3/2}} \quad i\]

Answer 4

thats what i thought but was not sure if it could simplify further...thank you

Answer 5

yeah put the ±in front of the last two lines

i have used \[\sqrt{-1}=i\]