Question

What are the solutions of 3x2 + 15 = -6x?
-1+/- i
-1+/- 2i
-2+/- i
-2+/- 2i

Answer 1

I know you can use the quad formula and basically get\[-6\pm \sqrt{144}\div6\]

Answer 2

@ranga

Answer 3

@satellite73

Answer 4

@zepdrix @abb0t

Answer 5

\[3x^2+6x+15 \]\[\frac{-6 \pm \sqrt{6^2 - 4*3*15}}{2*3}\]
\[\frac{ -6 \pm \sqrt{36-180} }{ 6 }\]
\[\frac{ -6 \pm \sqrt{-144} }{ 6 }\]