4x(x+2)-2(10x-3)+1=

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Solution for 4x(x+2)-2(10x-3)+1= equation:


Simplifying
4x(x + 2) + -2(10x + -3) + 1 = 0

Reorder the terms:
4x(2 + x) + -2(10x + -3) + 1 = 0
(2 * 4x + x * 4x) + -2(10x + -3) + 1 = 0
(8x + 4x2) + -2(10x + -3) + 1 = 0

Reorder the terms:
8x + 4x2 + -2(-3 + 10x) + 1 = 0
8x + 4x2 + (-3 * -2 + 10x * -2) + 1 = 0
8x + 4x2 + (6 + -20x) + 1 = 0

Reorder the terms:
6 + 1 + 8x + -20x + 4x2 = 0

Combine like terms: 6 + 1 = 7
7 + 8x + -20x + 4x2 = 0

Combine like terms: 8x + -20x = -12x
7 + -12x + 4x2 = 0

Solving
7 + -12x + 4x2 = 0

Solving for variable 'x'.

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

Divide each side by '4'.
1.75 + -3x + x2 = 0

Move the constant term to the right:

Add '-1.75' to each side of the equation.
1.75 + -3x + -1.75 + x2 = 0 + -1.75

Reorder the terms:
1.75 + -1.75 + -3x + x2 = 0 + -1.75

Combine like terms: 1.75 + -1.75 = 0.00
0.00 + -3x + x2 = 0 + -1.75
-3x + x2 = 0 + -1.75

Combine like terms: 0 + -1.75 = -1.75
-3x + x2 = -1.75

The x term is -3x.  Take half its coefficient (-1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
-3x + 2.25 + x2 = -1.75 + 2.25

Reorder the terms:
2.25 + -3x + x2 = -1.75 + 2.25

Combine like terms: -1.75 + 2.25 = 0.5
2.25 + -3x + x2 = 0.5

Factor a perfect square on the left side:
(x + -1.5)(x + -1.5) = 0.5

Calculate the square root of the right side: 0.707106781

Break this problem into two subproblems by setting 
(x + -1.5) equal to 0.707106781 and -0.707106781.

Subproblem 1

x + -1.5 = 0.707106781 Simplifying x + -1.5 = 0.707106781 Reorder the terms: -1.5 + x = 0.707106781 Solving -1.5 + x = 0.707106781 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + x = 0.707106781 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + x = 0.707106781 + 1.5 x = 0.707106781 + 1.5 Combine like terms: 0.707106781 + 1.5 = 2.207106781 x = 2.207106781 Simplifying x = 2.207106781

Subproblem 2

x + -1.5 = -0.707106781 Simplifying x + -1.5 = -0.707106781 Reorder the terms: -1.5 + x = -0.707106781 Solving -1.5 + x = -0.707106781 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + x = -0.707106781 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + x = -0.707106781 + 1.5 x = -0.707106781 + 1.5 Combine like terms: -0.707106781 + 1.5 = 0.792893219 x = 0.792893219 Simplifying x = 0.792893219

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.207106781, 0.792893219}

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