-2x^2+10x-7=0

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Solution for -2x^2+10x-7=0 equation: 


Simplifying
-2x2 + 10x + -7 = 0

Reorder the terms:
-7 + 10x + -2x2 = 0

Solving
-7 + 10x + -2x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-2 the coefficient of the squared term: 

Divide each side by '-2'.
3.5 + -5x + x2 = 0

Move the constant term to the right:

Add '-3.5' to each side of the equation.
3.5 + -5x + -3.5 + x2 = 0 + -3.5

Reorder the terms:
3.5 + -3.5 + -5x + x2 = 0 + -3.5

Combine like terms: 3.5 + -3.5 = 0.0
0.0 + -5x + x2 = 0 + -3.5
-5x + x2 = 0 + -3.5

Combine like terms: 0 + -3.5 = -3.5
-5x + x2 = -3.5

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 = -3.5 + 6.25

Reorder the terms:
6.25 + -5x + x2 = -3.5 + 6.25

Combine like terms: -3.5 + 6.25 = 2.75
6.25 + -5x + x2 = 2.75

Factor a perfect square on the left side:
(x + -2.5)(x + -2.5) = 2.75

Calculate the square root of the right side: 1.658312395

Break this problem into two subproblems by setting 
(x + -2.5) equal to 1.658312395 and -1.658312395.


Subproblem 1
x + -2.5 = 1.658312395

Simplifying
x + -2.5 = 1.658312395

Reorder the terms:
-2.5 + x = 1.658312395

Solving
-2.5 + x = 1.658312395

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 = 1.658312395 + 2.5

Combine like terms: -2.5 + 2.5 = 0.0
0.0 + x = 1.658312395 + 2.5
x = 1.658312395 + 2.5

Combine like terms: 1.658312395 + 2.5 = 4.158312395
x = 4.158312395

Simplifying
x = 4.158312395


Subproblem 2
x + -2.5 = -1.658312395

Simplifying
x + -2.5 = -1.658312395

Reorder the terms:
-2.5 + x = -1.658312395

Solving
-2.5 + x = -1.658312395

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 = -1.658312395 + 2.5

Combine like terms: -2.5 + 2.5 = 0.0
0.0 + x = -1.658312395 + 2.5
x = -1.658312395 + 2.5

Combine like terms: -1.658312395 + 2.5 = 0.841687605
x = 0.841687605

Simplifying
x = 0.841687605


Solution
The solution to the problem is based on the solutions
from the subproblems.
x = {4.158312395, 0.841687605}

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