Write in Standard Form -x=-10-x^2+3x

$- x = - 10 - x^{2} + 3 x$

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

Add $10$ to both sides of the equation.

$- x + 10 = - x^{2} + 3 x$

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

$- x + 10 + x^{2} = 3 x$

Subtract $3 x$ from both sides of the equation.

$- x + 10 + x^{2} - 3 x = 0$

Subtract $3 x$ from $- x$ .

$- 4 x + 10 + x^{2} = 0$

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

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

Move $10$ .

$- 4 x + x^{2} + 10 = 0$

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

$x^{2} - 4 x + 10 = 0$