(-2x^2)-5x+5=-50

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Solution for (-2x^2)-5x+5=-50 equation:


Simplifying
(-2x2) + -5x + 5 = -50

Reorder the terms:
5 + -5x + (-2x2) = -50

Solving
5 + -5x + (-2x2) = -50

Solving for variable 'x'.

Reorder the terms:
5 + 50 + -5x + (-2x2) = -50 + 50

Combine like terms: 5 + 50 = 55
55 + -5x + (-2x2) = -50 + 50

Combine like terms: -50 + 50 = 0
55 + -5x + (-2x2) = 0

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

Divide each side by '-2'.
-27.5 + 2.5x + x2 = 0

Move the constant term to the right:

Add '27.5' to each side of the equation.
-27.5 + 2.5x + 27.5 + x2 = 0 + 27.5

Reorder the terms:
-27.5 + 27.5 + 2.5x + x2 = 0 + 27.5

Combine like terms: -27.5 + 27.5 = 0.0
0.0 + 2.5x + x2 = 0 + 27.5
2.5x + x2 = 0 + 27.5

Combine like terms: 0 + 27.5 = 27.5
2.5x + x2 = 27.5

The x term is 2.5x.  Take half its coefficient (1.25).
Square it (1.5625) and add it to both sides.

Add '1.5625' to each side of the equation.
2.5x + 1.5625 + x2 = 27.5 + 1.5625

Reorder the terms:
1.5625 + 2.5x + x2 = 27.5 + 1.5625

Combine like terms: 27.5 + 1.5625 = 29.0625
1.5625 + 2.5x + x2 = 29.0625

Factor a perfect square on the left side:
((x) + 1.25)((x) + 1.25) = 29.0625

Calculate the square root of the right side: 5.390964663

Break this problem into two subproblems by setting 
((x) + 1.25) equal to 5.390964663 and -5.390964663.

Subproblem 1

(x) + 1.25 = 5.390964663 Simplifying (x) + 1.25 = 5.390964663 x + 1.25 = 5.390964663 Reorder the terms: 1.25 + x = 5.390964663 Solving 1.25 + x = 5.390964663 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.25' to each side of the equation. 1.25 + -1.25 + x = 5.390964663 + -1.25 Combine like terms: 1.25 + -1.25 = 0.00 0.00 + x = 5.390964663 + -1.25 x = 5.390964663 + -1.25 Combine like terms: 5.390964663 + -1.25 = 4.140964663 x = 4.140964663 Simplifying x = 4.140964663

Subproblem 2

(x) + 1.25 = -5.390964663 Simplifying (x) + 1.25 = -5.390964663 x + 1.25 = -5.390964663 Reorder the terms: 1.25 + x = -5.390964663 Solving 1.25 + x = -5.390964663 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.25' to each side of the equation. 1.25 + -1.25 + x = -5.390964663 + -1.25 Combine like terms: 1.25 + -1.25 = 0.00 0.00 + x = -5.390964663 + -1.25 x = -5.390964663 + -1.25 Combine like terms: -5.390964663 + -1.25 = -6.640964663 x = -6.640964663 Simplifying x = -6.640964663

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.140964663, -6.640964663}

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