100=3.12x^2

Solution for 100=3.12x^2 equation:

Simplifying
100 = 3.12x2

Solving
100 = 3.12x2

Solving for variable 'x'.

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

Add '-3.12x2' to each side of the equation.
100 + -3.12x2 = 3.12x2 + -3.12x2

Combine like terms: 3.12x2 + -3.12x2 = 0.00
100 + -3.12x2 = 0.00

Add '-100' to each side of the equation.
100 + -100 + -3.12x2 = 0.00 + -100

Combine like terms: 100 + -100 = 0
0 + -3.12x2 = 0.00 + -100
-3.12x2 = 0.00 + -100

Combine like terms: 0.00 + -100 = -100
-3.12x2 = -100

Divide each side by '-3.12'.
x2 = 32.05128205

Simplifying
x2 = 32.05128205

Take the square root of each side:
x = {-5.661385171, 5.661385171}