12=3.14x^2

Solution for 12=3.14x^2 equation:

Simplifying
12 = 3.14x2

Solving
12 = 3.14x2

Solving for variable 'x'.

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

Add '-3.14x2' to each side of the equation.
12 + -3.14x2 = 3.14x2 + -3.14x2

Combine like terms: 3.14x2 + -3.14x2 = 0.00
12 + -3.14x2 = 0.00

Add '-12' to each side of the equation.
12 + -12 + -3.14x2 = 0.00 + -12

Combine like terms: 12 + -12 = 0
0 + -3.14x2 = 0.00 + -12
-3.14x2 = 0.00 + -12

Combine like terms: 0.00 + -12 = -12
-3.14x2 = -12

Divide each side by '-3.14'.
x2 = 3.821656051

Simplifying
x2 = 3.821656051

Take the square root of each side:
x = {-1.954905637, 1.954905637}