.09x^2+.03=.21

Solution for .09x^2+.03=.21 equation:

Simplifying
0.09x2 + 0.03 = 0.21

Reorder the terms:
0.03 + 0.09x2 = 0.21

Solving
0.03 + 0.09x2 = 0.21

Solving for variable 'x'.

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

Add '-0.03' to each side of the equation.
0.03 + -0.03 + 0.09x2 = 0.21 + -0.03

Combine like terms: 0.03 + -0.03 = 0.00
0.00 + 0.09x2 = 0.21 + -0.03
0.09x2 = 0.21 + -0.03

Combine like terms: 0.21 + -0.03 = 0.18
0.09x2 = 0.18

Divide each side by '0.09'.
x2 = 2

Simplifying
x2 = 2

Take the square root of each side:
x = {-1.414213562, 1.414213562}