4=13x^2

Solution for 4=13x^2 equation:

Simplifying
4 = 13x2

Solving
4 = 13x2

Solving for variable 'x'.

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

Add '-13x2' to each side of the equation.
4 + -13x2 = 13x2 + -13x2

Combine like terms: 13x2 + -13x2 = 0
4 + -13x2 = 0

Add '-4' to each side of the equation.
4 + -4 + -13x2 = 0 + -4

Combine like terms: 4 + -4 = 0
0 + -13x2 = 0 + -4
-13x2 = 0 + -4

Combine like terms: 0 + -4 = -4
-13x2 = -4

Divide each side by '-13'.
x2 = 0.3076923077

Simplifying
x2 = 0.3076923077

Take the square root of each side:
x = {-0.554700196, 0.554700196}