0.1x^2-10x-560=0

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Solution for 0.1x^2-10x-560=0 equation:


Simplifying
0.1x2 + -10x + -560 = 0

Reorder the terms:
-560 + -10x + 0.1x2 = 0

Solving
-560 + -10x + 0.1x2 = 0

Solving for variable 'x'.

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

Divide each side by '0.1'.
-5600 + -100x + x2 = 0

Move the constant term to the right:

Add '5600' to each side of the equation.
-5600 + -100x + 5600 + x2 = 0 + 5600

Reorder the terms:
-5600 + 5600 + -100x + x2 = 0 + 5600

Combine like terms: -5600 + 5600 = 0
0 + -100x + x2 = 0 + 5600
-100x + x2 = 0 + 5600

Combine like terms: 0 + 5600 = 5600
-100x + x2 = 5600

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 = 5600 + 2500

Reorder the terms:
2500 + -100x + x2 = 5600 + 2500

Combine like terms: 5600 + 2500 = 8100
2500 + -100x + x2 = 8100

Factor a perfect square on the left side:
(x + -50)(x + -50) = 8100

Calculate the square root of the right side: 90

Break this problem into two subproblems by setting 
(x + -50) equal to 90 and -90.

Subproblem 1

x + -50 = 90 Simplifying x + -50 = 90 Reorder the terms: -50 + x = 90 Solving -50 + x = 90 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 = 90 + 50 Combine like terms: -50 + 50 = 0 0 + x = 90 + 50 x = 90 + 50 Combine like terms: 90 + 50 = 140 x = 140 Simplifying x = 140

Subproblem 2

x + -50 = -90 Simplifying x + -50 = -90 Reorder the terms: -50 + x = -90 Solving -50 + x = -90 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 = -90 + 50 Combine like terms: -50 + 50 = 0 0 + x = -90 + 50 x = -90 + 50 Combine like terms: -90 + 50 = -40 x = -40 Simplifying x = -40

Solution

The solution to the problem is based on the solutions from the subproblems. x = {140, -40}

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