-x^2+100x-300=0

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Solution for -x^2+100x-300=0 equation:


Simplifying
-1x2 + 100x + -300 = 0

Reorder the terms:
-300 + 100x + -1x2 = 0

Solving
-300 + 100x + -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'.
300 + -100x + x2 = 0

Move the constant term to the right:

Add '-300' to each side of the equation.
300 + -100x + -300 + x2 = 0 + -300

Reorder the terms:
300 + -300 + -100x + x2 = 0 + -300

Combine like terms: 300 + -300 = 0
0 + -100x + x2 = 0 + -300
-100x + x2 = 0 + -300

Combine like terms: 0 + -300 = -300
-100x + x2 = -300

The x term is -100x.  Take half its coefficient (-50).
Square it (2500) and add it to both sides.

Add '2500' to each side of the equation.
-100x + 2500 + x2 = -300 + 2500

Reorder the terms:
2500 + -100x + x2 = -300 + 2500

Combine like terms: -300 + 2500 = 2200
2500 + -100x + x2 = 2200

Factor a perfect square on the left side:
(x + -50)(x + -50) = 2200

Calculate the square root of the right side: 46.904157598

Break this problem into two subproblems by setting 
(x + -50) equal to 46.904157598 and -46.904157598.

Subproblem 1

x + -50 = 46.904157598 Simplifying x + -50 = 46.904157598 Reorder the terms: -50 + x = 46.904157598 Solving -50 + x = 46.904157598 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '50' to each side of the equation. -50 + 50 + x = 46.904157598 + 50 Combine like terms: -50 + 50 = 0 0 + x = 46.904157598 + 50 x = 46.904157598 + 50 Combine like terms: 46.904157598 + 50 = 96.904157598 x = 96.904157598 Simplifying x = 96.904157598

Subproblem 2

x + -50 = -46.904157598 Simplifying x + -50 = -46.904157598 Reorder the terms: -50 + x = -46.904157598 Solving -50 + x = -46.904157598 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '50' to each side of the equation. -50 + 50 + x = -46.904157598 + 50 Combine like terms: -50 + 50 = 0 0 + x = -46.904157598 + 50 x = -46.904157598 + 50 Combine like terms: -46.904157598 + 50 = 3.095842402 x = 3.095842402 Simplifying x = 3.095842402

Solution

The solution to the problem is based on the solutions from the subproblems. x = {96.904157598, 3.095842402}

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