x^2-3.3-0.7=0

Solution for x^2-3.3-0.7=0 equation:

Simplifying
x2 + -3.3 + -0.7 = 0

Reorder the terms:
-3.3 + -0.7 + x2 = 0

Combine like terms: -3.3 + -0.7 = -4
-4 + x2 = 0

Solving
-4 + x2 = 0

Solving for variable 'x'.

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

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

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

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

Simplifying
x2 = 4

Take the square root of each side:
x = {-2, 2}