0=.1x^2+.49-2

Solution for 0=.1x^2+.49-2 equation:

Simplifying
0 = 0.1x2 + 0.49 + -2

Reorder the terms:
0 = 0.49 + -2 + 0.1x2

Combine like terms: 0.49 + -2 = -1.51
0 = -1.51 + 0.1x2

Solving
0 = -1.51 + 0.1x2

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-0.1x2' to each side of the equation.
0 + -0.1x2 = -1.51 + 0.1x2 + -0.1x2
Remove the zero:
-0.1x2 = -1.51 + 0.1x2 + -0.1x2

Combine like terms: 0.1x2 + -0.1x2 = 0.0
-0.1x2 = -1.51 + 0.0
-0.1x2 = -1.51

Divide each side by '-0.1'.
x2 = 15.1

Simplifying
x2 = 15.1

Take the square root of each side:
x = {-3.885871846, 3.885871846}