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

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

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

Subtract $11$ from both sides of the equation.

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

Add $3 x^{2}$ to both sides of the equation.

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

Add $x^{2}$ and $3 x^{2}$ .

$3 x + 4 x^{2} - 11 = 0$

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

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

Reorder $3 x$ and $4 x^{2}$ .

$4 x^{2} + 3 x - 11 = 0$