anonymous 4 years ago x^2=-9

1. anonymous

To solve you would take the square root of both sides, but you can not take the square root of a negative number. So there's no solution

2. anonymous

but if your subject require you to find the complex root you can also solve this

3. anonymous

its just it has no Real number solution root , but theres complex root, do you want me to show you?

4. anonymous

yes

5. anonymous

remember $\sqrt{-1}=i$

6. anonymous

x^2=-9 square root on both sides gives $x=\sqrt{-9}$ $x=\sqrt{9(-1)}$ $x=+9 i and x=-3 i$

7. anonymous

im sorry thats x= plus or minus 3 i

8. anonymous

x= 3 i, x= -3 i thats your complex roots