-2x^2+10x+22=4

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Solution for -2x^2+10x+22=4 equation:


Simplifying
-2x2 + 10x + 22 = 4

Reorder the terms:
22 + 10x + -2x2 = 4

Solving
22 + 10x + -2x2 = 4

Solving for variable 'x'.

Reorder the terms:
22 + -4 + 10x + -2x2 = 4 + -4

Combine like terms: 22 + -4 = 18
18 + 10x + -2x2 = 4 + -4

Combine like terms: 4 + -4 = 0
18 + 10x + -2x2 = 0

Factor out the Greatest Common Factor (GCF), '2'.
2(9 + 5x + -1x2) = 0

Ignore the factor 2.

Subproblem 1
Set the factor '(9 + 5x + -1x2)' equal to zero and attempt to solve:

Simplifying
9 + 5x + -1x2 = 0

Solving
9 + 5x + -1x2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-9 + -5x + x2 = 0

Move the constant term to the right:

Add '9' to each side of the equation.
-9 + -5x + 9 + x2 = 0 + 9

Reorder the terms:
-9 + 9 + -5x + x2 = 0 + 9

Combine like terms: -9 + 9 = 0
0 + -5x + x2 = 0 + 9
-5x + x2 = 0 + 9

Combine like terms: 0 + 9 = 9
-5x + x2 = 9

The x term is -5x.  Take half its coefficient (-2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
-5x + 6.25 + x2 = 9 + 6.25

Reorder the terms:
6.25 + -5x + x2 = 9 + 6.25

Combine like terms: 9 + 6.25 = 15.25
6.25 + -5x + x2 = 15.25

Factor a perfect square on the left side:
(x + -2.5)(x + -2.5) = 15.25

Calculate the square root of the right side: 3.905124838

Break this problem into two subproblems by setting 
(x + -2.5) equal to 3.905124838 and -3.905124838.


Subproblem 1
x + -2.5 = 3.905124838

Simplifying
x + -2.5 = 3.905124838

Reorder the terms:
-2.5 + x = 3.905124838

Solving
-2.5 + x = 3.905124838

Solving for variable 'x'.

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

Add '2.5' to each side of the equation.
-2.5 + 2.5 + x = 3.905124838 + 2.5

Combine like terms: -2.5 + 2.5 = 0.0
0.0 + x = 3.905124838 + 2.5
x = 3.905124838 + 2.5

Combine like terms: 3.905124838 + 2.5 = 6.405124838
x = 6.405124838

Simplifying
x = 6.405124838


Subproblem 2
x + -2.5 = -3.905124838

Simplifying
x + -2.5 = -3.905124838

Reorder the terms:
-2.5 + x = -3.905124838

Solving
-2.5 + x = -3.905124838

Solving for variable 'x'.

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

Add '2.5' to each side of the equation.
-2.5 + 2.5 + x = -3.905124838 + 2.5

Combine like terms: -2.5 + 2.5 = 0.0
0.0 + x = -3.905124838 + 2.5
x = -3.905124838 + 2.5

Combine like terms: -3.905124838 + 2.5 = -1.405124838
x = -1.405124838

Simplifying
x = -1.405124838


Solution
The solution to the problem is based on the solutions
from the subproblems.
x = {6.405124838, -1.405124838}
Solution
x = {6.405124838, -1.405124838}

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