(2x)x-1=4

Solution for (2x)x-1=4 equation:

Simplifying
(2x) * x + -1 = 4

Remove parenthesis around (2x)
2x * x + -1 = 4

Multiply x * x
2x2 + -1 = 4

Reorder the terms:
-1 + 2x2 = 4

Solving
-1 + 2x2 = 4

Solving for variable 'x'.

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

Add '1' to each side of the equation.
-1 + 1 + 2x2 = 4 + 1

Combine like terms: -1 + 1 = 0
0 + 2x2 = 4 + 1
2x2 = 4 + 1

Combine like terms: 4 + 1 = 5
2x2 = 5

Divide each side by '2'.
x2 = 2.5

Simplifying
x2 = 2.5

Take the square root of each side:
x = {-1.58113883, 1.58113883}