-x^2+14x+75=0

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Solution for -x^2+14x+75=0 equation:


Simplifying
-1x2 + 14x + 75 = 0

Reorder the terms:
75 + 14x + -1x2 = 0

Solving
75 + 14x + -1x2 = 0

Solving for variable 'x'.

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

Divide each side by '-1'.
-75 + -14x + x2 = 0

Move the constant term to the right:

Add '75' to each side of the equation.
-75 + -14x + 75 + x2 = 0 + 75

Reorder the terms:
-75 + 75 + -14x + x2 = 0 + 75

Combine like terms: -75 + 75 = 0
0 + -14x + x2 = 0 + 75
-14x + x2 = 0 + 75

Combine like terms: 0 + 75 = 75
-14x + x2 = 75

The x term is -14x.  Take half its coefficient (-7).
Square it (49) and add it to both sides.

Add '49' to each side of the equation.
-14x + 49 + x2 = 75 + 49

Reorder the terms:
49 + -14x + x2 = 75 + 49

Combine like terms: 75 + 49 = 124
49 + -14x + x2 = 124

Factor a perfect square on the left side:
(x + -7)(x + -7) = 124

Calculate the square root of the right side: 11.135528726

Break this problem into two subproblems by setting 
(x + -7) equal to 11.135528726 and -11.135528726.

Subproblem 1

x + -7 = 11.135528726 Simplifying x + -7 = 11.135528726 Reorder the terms: -7 + x = 11.135528726 Solving -7 + x = 11.135528726 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + x = 11.135528726 + 7 Combine like terms: -7 + 7 = 0 0 + x = 11.135528726 + 7 x = 11.135528726 + 7 Combine like terms: 11.135528726 + 7 = 18.135528726 x = 18.135528726 Simplifying x = 18.135528726

Subproblem 2

x + -7 = -11.135528726 Simplifying x + -7 = -11.135528726 Reorder the terms: -7 + x = -11.135528726 Solving -7 + x = -11.135528726 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + x = -11.135528726 + 7 Combine like terms: -7 + 7 = 0 0 + x = -11.135528726 + 7 x = -11.135528726 + 7 Combine like terms: -11.135528726 + 7 = -4.135528726 x = -4.135528726 Simplifying x = -4.135528726

Solution

The solution to the problem is based on the solutions from the subproblems. x = {18.135528726, -4.135528726}

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