x^2-10x-10x=11

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Solution for x^2-10x-10x=11 equation:


Simplifying
x2 + -10x + -10x = 11

Reorder the terms:
-10x + -10x + x2 = 11

Combine like terms: -10x + -10x = -20x
-20x + x2 = 11

Solving
-20x + x2 = 11

Solving for variable 'x'.

Reorder the terms:
-11 + -20x + x2 = 11 + -11

Combine like terms: 11 + -11 = 0
-11 + -20x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '11' to each side of the equation.
-11 + -20x + 11 + x2 = 0 + 11

Reorder the terms:
-11 + 11 + -20x + x2 = 0 + 11

Combine like terms: -11 + 11 = 0
0 + -20x + x2 = 0 + 11
-20x + x2 = 0 + 11

Combine like terms: 0 + 11 = 11
-20x + x2 = 11

The x term is -20x.  Take half its coefficient (-10).
Square it (100) and add it to both sides.

Add '100' to each side of the equation.
-20x + 100 + x2 = 11 + 100

Reorder the terms:
100 + -20x + x2 = 11 + 100

Combine like terms: 11 + 100 = 111
100 + -20x + x2 = 111

Factor a perfect square on the left side:
(x + -10)(x + -10) = 111

Calculate the square root of the right side: 10.535653753

Break this problem into two subproblems by setting 
(x + -10) equal to 10.535653753 and -10.535653753.

Subproblem 1

x + -10 = 10.535653753 Simplifying x + -10 = 10.535653753 Reorder the terms: -10 + x = 10.535653753 Solving -10 + x = 10.535653753 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '10' to each side of the equation. -10 + 10 + x = 10.535653753 + 10 Combine like terms: -10 + 10 = 0 0 + x = 10.535653753 + 10 x = 10.535653753 + 10 Combine like terms: 10.535653753 + 10 = 20.535653753 x = 20.535653753 Simplifying x = 20.535653753

Subproblem 2

x + -10 = -10.535653753 Simplifying x + -10 = -10.535653753 Reorder the terms: -10 + x = -10.535653753 Solving -10 + x = -10.535653753 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '10' to each side of the equation. -10 + 10 + x = -10.535653753 + 10 Combine like terms: -10 + 10 = 0 0 + x = -10.535653753 + 10 x = -10.535653753 + 10 Combine like terms: -10.535653753 + 10 = -0.535653753 x = -0.535653753 Simplifying x = -0.535653753

Solution

The solution to the problem is based on the solutions from the subproblems. x = {20.535653753, -0.535653753}

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