2x*4-x+7+4x-8-5x^2+2+3x=

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Solution for 2x*4-x+7+4x-8-5x^2+2+3x= equation:


Simplifying
2x * 4 + -1x + 7 + 4x + -8 + -5x2 + 2 + 3x = 0

Reorder the terms for easier multiplication:
2 * 4x + -1x + 7 + 4x + -8 + -5x2 + 2 + 3x = 0

Multiply 2 * 4
8x + -1x + 7 + 4x + -8 + -5x2 + 2 + 3x = 0

Reorder the terms:
7 + -8 + 2 + 8x + -1x + 4x + 3x + -5x2 = 0

Combine like terms: 7 + -8 = -1
-1 + 2 + 8x + -1x + 4x + 3x + -5x2 = 0

Combine like terms: -1 + 2 = 1
1 + 8x + -1x + 4x + 3x + -5x2 = 0

Combine like terms: 8x + -1x = 7x
1 + 7x + 4x + 3x + -5x2 = 0

Combine like terms: 7x + 4x = 11x
1 + 11x + 3x + -5x2 = 0

Combine like terms: 11x + 3x = 14x
1 + 14x + -5x2 = 0

Solving
1 + 14x + -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'.
-0.2 + -2.8x + x2 = 0

Move the constant term to the right:

Add '0.2' to each side of the equation.
-0.2 + -2.8x + 0.2 + x2 = 0 + 0.2

Reorder the terms:
-0.2 + 0.2 + -2.8x + x2 = 0 + 0.2

Combine like terms: -0.2 + 0.2 = 0.0
0.0 + -2.8x + x2 = 0 + 0.2
-2.8x + x2 = 0 + 0.2

Combine like terms: 0 + 0.2 = 0.2
-2.8x + x2 = 0.2

The x term is -2.8x.  Take half its coefficient (-1.4).
Square it (1.96) and add it to both sides.

Add '1.96' to each side of the equation.
-2.8x + 1.96 + x2 = 0.2 + 1.96

Reorder the terms:
1.96 + -2.8x + x2 = 0.2 + 1.96

Combine like terms: 0.2 + 1.96 = 2.16
1.96 + -2.8x + x2 = 2.16

Factor a perfect square on the left side:
(x + -1.4)(x + -1.4) = 2.16

Calculate the square root of the right side: 1.469693846

Break this problem into two subproblems by setting 
(x + -1.4) equal to 1.469693846 and -1.469693846.

Subproblem 1

x + -1.4 = 1.469693846 Simplifying x + -1.4 = 1.469693846 Reorder the terms: -1.4 + x = 1.469693846 Solving -1.4 + x = 1.469693846 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.4' to each side of the equation. -1.4 + 1.4 + x = 1.469693846 + 1.4 Combine like terms: -1.4 + 1.4 = 0.0 0.0 + x = 1.469693846 + 1.4 x = 1.469693846 + 1.4 Combine like terms: 1.469693846 + 1.4 = 2.869693846 x = 2.869693846 Simplifying x = 2.869693846

Subproblem 2

x + -1.4 = -1.469693846 Simplifying x + -1.4 = -1.469693846 Reorder the terms: -1.4 + x = -1.469693846 Solving -1.4 + x = -1.469693846 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.4' to each side of the equation. -1.4 + 1.4 + x = -1.469693846 + 1.4 Combine like terms: -1.4 + 1.4 = 0.0 0.0 + x = -1.469693846 + 1.4 x = -1.469693846 + 1.4 Combine like terms: -1.469693846 + 1.4 = -0.069693846 x = -0.069693846 Simplifying x = -0.069693846

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.869693846, -0.069693846}

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