Question

-2x²+800=0
Me ajudem por favor

Answer 1

-2X²=800
x²=800/2
x²=400
x=√400
x=20

Answer 2

-2$x^{2}$+800=0
-$x_{2}$=$\frac{800}{2}$
-$x_{2}$=400
-x=$\sqrt{400}$
-x=20.(-1)
x=-20