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

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


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

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

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

Combine like terms: -3x + -7x = -10x
4 + -10x + 5x2 + -4x2 = 0

Combine like terms: 5x2 + -4x2 = 1x2
4 + -10x + 1x2 = 0

Solving
4 + -10x + 1x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '-4' to each side of the equation.
4 + -10x + -4 + x2 = 0 + -4

Reorder the terms:
4 + -4 + -10x + x2 = 0 + -4

Combine like terms: 4 + -4 = 0
0 + -10x + x2 = 0 + -4
-10x + x2 = 0 + -4

Combine like terms: 0 + -4 = -4
-10x + x2 = -4

The x term is -10x.  Take half its coefficient (-5).
Square it (25) and add it to both sides.

Add '25' to each side of the equation.
-10x + 25 + x2 = -4 + 25

Reorder the terms:
25 + -10x + x2 = -4 + 25

Combine like terms: -4 + 25 = 21
25 + -10x + x2 = 21

Factor a perfect square on the left side:
(x + -5)(x + -5) = 21

Calculate the square root of the right side: 4.582575695

Break this problem into two subproblems by setting 
(x + -5) equal to 4.582575695 and -4.582575695.


Subproblem 1
x + -5 = 4.582575695

Simplifying
x + -5 = 4.582575695

Reorder the terms:
-5 + x = 4.582575695

Solving
-5 + x = 4.582575695

Solving for variable 'x'.

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

Add '5' to each side of the equation.
-5 + 5 + x = 4.582575695 + 5

Combine like terms: -5 + 5 = 0
0 + x = 4.582575695 + 5
x = 4.582575695 + 5

Combine like terms: 4.582575695 + 5 = 9.582575695
x = 9.582575695

Simplifying
x = 9.582575695


Subproblem 2
x + -5 = -4.582575695

Simplifying
x + -5 = -4.582575695

Reorder the terms:
-5 + x = -4.582575695

Solving
-5 + x = -4.582575695

Solving for variable 'x'.

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

Add '5' to each side of the equation.
-5 + 5 + x = -4.582575695 + 5

Combine like terms: -5 + 5 = 0
0 + x = -4.582575695 + 5
x = -4.582575695 + 5

Combine like terms: -4.582575695 + 5 = 0.417424305
x = 0.417424305

Simplifying
x = 0.417424305


Solution
The solution to the problem is based on the solutions
from the subproblems.
x = {9.582575695, 0.417424305}

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