Write in Standard Form 6+3x^2=-3x

$6 + 3 x^{2} = - 3 x$

Add $3 x$ to both sides of the equation.

$6 + 3 x^{2} + 3 x = 0$

To write a polynomial in standard form, simplify and then arrange the terms in descending order.

$a x^{2} + b x + c = 0$

Move $6$ .

$3 x^{2} + 3 x + 6 = 0$