4x^2-4x+7x-7=2x-1

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Solution for 4x^2-4x+7x-7=2x-1 equation:


Simplifying
4x2 + -4x + 7x + -7 = 2x + -1

Reorder the terms:
-7 + -4x + 7x + 4x2 = 2x + -1

Combine like terms: -4x + 7x = 3x
-7 + 3x + 4x2 = 2x + -1

Reorder the terms:
-7 + 3x + 4x2 = -1 + 2x

Solving
-7 + 3x + 4x2 = -1 + 2x

Solving for variable 'x'.

Reorder the terms:
-7 + 1 + 3x + -2x + 4x2 = -1 + 2x + 1 + -2x

Combine like terms: -7 + 1 = -6
-6 + 3x + -2x + 4x2 = -1 + 2x + 1 + -2x

Combine like terms: 3x + -2x = 1x
-6 + 1x + 4x2 = -1 + 2x + 1 + -2x

Reorder the terms:
-6 + 1x + 4x2 = -1 + 1 + 2x + -2x

Combine like terms: -1 + 1 = 0
-6 + 1x + 4x2 = 0 + 2x + -2x
-6 + 1x + 4x2 = 2x + -2x

Combine like terms: 2x + -2x = 0
-6 + 1x + 4x2 = 0

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

Divide each side by '4'.
-1.5 + 0.25x + x2 = 0

Move the constant term to the right:

Add '1.5' to each side of the equation.
-1.5 + 0.25x + 1.5 + x2 = 0 + 1.5

Reorder the terms:
-1.5 + 1.5 + 0.25x + x2 = 0 + 1.5

Combine like terms: -1.5 + 1.5 = 0.0
0.0 + 0.25x + x2 = 0 + 1.5
0.25x + x2 = 0 + 1.5

Combine like terms: 0 + 1.5 = 1.5
0.25x + x2 = 1.5

The x term is 0.25x.  Take half its coefficient (0.125).
Square it (0.015625) and add it to both sides.

Add '0.015625' to each side of the equation.
0.25x + 0.015625 + x2 = 1.5 + 0.015625

Reorder the terms:
0.015625 + 0.25x + x2 = 1.5 + 0.015625

Combine like terms: 1.5 + 0.015625 = 1.515625
0.015625 + 0.25x + x2 = 1.515625

Factor a perfect square on the left side:
(x + 0.125)(x + 0.125) = 1.515625

Calculate the square root of the right side: 1.231107225

Break this problem into two subproblems by setting 
(x + 0.125) equal to 1.231107225 and -1.231107225.

Subproblem 1

x + 0.125 = 1.231107225 Simplifying x + 0.125 = 1.231107225 Reorder the terms: 0.125 + x = 1.231107225 Solving 0.125 + x = 1.231107225 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.125' to each side of the equation. 0.125 + -0.125 + x = 1.231107225 + -0.125 Combine like terms: 0.125 + -0.125 = 0.000 0.000 + x = 1.231107225 + -0.125 x = 1.231107225 + -0.125 Combine like terms: 1.231107225 + -0.125 = 1.106107225 x = 1.106107225 Simplifying x = 1.106107225

Subproblem 2

x + 0.125 = -1.231107225 Simplifying x + 0.125 = -1.231107225 Reorder the terms: 0.125 + x = -1.231107225 Solving 0.125 + x = -1.231107225 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.125' to each side of the equation. 0.125 + -0.125 + x = -1.231107225 + -0.125 Combine like terms: 0.125 + -0.125 = 0.000 0.000 + x = -1.231107225 + -0.125 x = -1.231107225 + -0.125 Combine like terms: -1.231107225 + -0.125 = -1.356107225 x = -1.356107225 Simplifying x = -1.356107225

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.106107225, -1.356107225}

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