(4x)4+5x(x-1)+4=0

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Solution for (4x)4+5x(x-1)+4=0 equation:


Simplifying
(4x) * 4 + 5x(x + -1) + 4 = 0

Remove parenthesis around (4x)
4x * 4 + 5x(x + -1) + 4 = 0

Reorder the terms for easier multiplication:
4 * 4x + 5x(x + -1) + 4 = 0

Multiply 4 * 4
16x + 5x(x + -1) + 4 = 0

Reorder the terms:
16x + 5x(-1 + x) + 4 = 0
16x + (-1 * 5x + x * 5x) + 4 = 0
16x + (-5x + 5x2) + 4 = 0

Reorder the terms:
4 + 16x + -5x + 5x2 = 0

Combine like terms: 16x + -5x = 11x
4 + 11x + 5x2 = 0

Solving
4 + 11x + 5x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
5 the coefficient of the squared term: 

Divide each side by '5'.
0.8 + 2.2x + x2 = 0

Move the constant term to the right:

Add '-0.8' to each side of the equation.
0.8 + 2.2x + -0.8 + x2 = 0 + -0.8

Reorder the terms:
0.8 + -0.8 + 2.2x + x2 = 0 + -0.8

Combine like terms: 0.8 + -0.8 = 0.0
0.0 + 2.2x + x2 = 0 + -0.8
2.2x + x2 = 0 + -0.8

Combine like terms: 0 + -0.8 = -0.8
2.2x + x2 = -0.8

The x term is 2.2x.  Take half its coefficient (1.1).
Square it (1.21) and add it to both sides.

Add '1.21' to each side of the equation.
2.2x + 1.21 + x2 = -0.8 + 1.21

Reorder the terms:
1.21 + 2.2x + x2 = -0.8 + 1.21

Combine like terms: -0.8 + 1.21 = 0.41
1.21 + 2.2x + x2 = 0.41

Factor a perfect square on the left side:
(x + 1.1)(x + 1.1) = 0.41

Calculate the square root of the right side: 0.640312424

Break this problem into two subproblems by setting 
(x + 1.1) equal to 0.640312424 and -0.640312424.

Subproblem 1

x + 1.1 = 0.640312424 Simplifying x + 1.1 = 0.640312424 Reorder the terms: 1.1 + x = 0.640312424 Solving 1.1 + x = 0.640312424 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.1' to each side of the equation. 1.1 + -1.1 + x = 0.640312424 + -1.1 Combine like terms: 1.1 + -1.1 = 0.0 0.0 + x = 0.640312424 + -1.1 x = 0.640312424 + -1.1 Combine like terms: 0.640312424 + -1.1 = -0.459687576 x = -0.459687576 Simplifying x = -0.459687576

Subproblem 2

x + 1.1 = -0.640312424 Simplifying x + 1.1 = -0.640312424 Reorder the terms: 1.1 + x = -0.640312424 Solving 1.1 + x = -0.640312424 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.1' to each side of the equation. 1.1 + -1.1 + x = -0.640312424 + -1.1 Combine like terms: 1.1 + -1.1 = 0.0 0.0 + x = -0.640312424 + -1.1 x = -0.640312424 + -1.1 Combine like terms: -0.640312424 + -1.1 = -1.740312424 x = -1.740312424 Simplifying x = -1.740312424

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.459687576, -1.740312424}

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