Katlyn99 x^2=-9 one year ago one year ago

1. CalebBeavers

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. mark_o.

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

3. mark_o.

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

4. Katlyn99

yes

5. mark_o.

remember $\sqrt{-1}=i$

6. mark_o.

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

7. mark_o.

im sorry thats x= plus or minus 3 i

8. mark_o.

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