Write in Standard Form 11x=3x^2-9

$11 x = 3 x^{2} - 9$

Move all the expressions to the left side of the equation.

Subtract $3 x^{2}$ from both sides of the equation.

$11 x - 3 x^{2} = - 9$

Add $9$ to both sides of the equation.

$11 x - 3 x^{2} + 9 = 0$

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

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

Reorder $11 x$ and $- 3 x^{2}$ .

$- 3 x^{2} + 11 x + 9 = 0$