-0.5x^2+26x+7=0

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Solution for -0.5x^2+26x+7=0 equation:


Simplifying
-0.5x2 + 26x + 7 = 0

Reorder the terms:
7 + 26x + -0.5x2 = 0

Solving
7 + 26x + -0.5x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-0.5 the coefficient of the squared term: 

Divide each side by '-0.5'.
-14 + -52x + x2 = 0

Move the constant term to the right:

Add '14' to each side of the equation.
-14 + -52x + 14 + x2 = 0 + 14

Reorder the terms:
-14 + 14 + -52x + x2 = 0 + 14

Combine like terms: -14 + 14 = 0
0 + -52x + x2 = 0 + 14
-52x + x2 = 0 + 14

Combine like terms: 0 + 14 = 14
-52x + x2 = 14

The x term is -52x.  Take half its coefficient (-26).
Square it (676) and add it to both sides.

Add '676' to each side of the equation.
-52x + 676 + x2 = 14 + 676

Reorder the terms:
676 + -52x + x2 = 14 + 676

Combine like terms: 14 + 676 = 690
676 + -52x + x2 = 690

Factor a perfect square on the left side:
(x + -26)(x + -26) = 690

Calculate the square root of the right side: 26.267851073

Break this problem into two subproblems by setting 
(x + -26) equal to 26.267851073 and -26.267851073.

Subproblem 1

x + -26 = 26.267851073 Simplifying x + -26 = 26.267851073 Reorder the terms: -26 + x = 26.267851073 Solving -26 + x = 26.267851073 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '26' to each side of the equation. -26 + 26 + x = 26.267851073 + 26 Combine like terms: -26 + 26 = 0 0 + x = 26.267851073 + 26 x = 26.267851073 + 26 Combine like terms: 26.267851073 + 26 = 52.267851073 x = 52.267851073 Simplifying x = 52.267851073

Subproblem 2

x + -26 = -26.267851073 Simplifying x + -26 = -26.267851073 Reorder the terms: -26 + x = -26.267851073 Solving -26 + x = -26.267851073 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '26' to each side of the equation. -26 + 26 + x = -26.267851073 + 26 Combine like terms: -26 + 26 = 0 0 + x = -26.267851073 + 26 x = -26.267851073 + 26 Combine like terms: -26.267851073 + 26 = -0.267851073 x = -0.267851073 Simplifying x = -0.267851073

Solution

The solution to the problem is based on the solutions from the subproblems. x = {52.267851073, -0.267851073}

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