10x^2-11x-56=5x^2

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Solution for 10x^2-11x-56=5x^2 equation:


Simplifying
10x2 + -11x + -56 = 5x2

Reorder the terms:
-56 + -11x + 10x2 = 5x2

Solving
-56 + -11x + 10x2 = 5x2

Solving for variable 'x'.

Combine like terms: 10x2 + -5x2 = 5x2
-56 + -11x + 5x2 = 5x2 + -5x2

Combine like terms: 5x2 + -5x2 = 0
-56 + -11x + 5x2 = 0

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

Divide each side by '5'.
-11.2 + -2.2x + x2 = 0

Move the constant term to the right:

Add '11.2' to each side of the equation.
-11.2 + -2.2x + 11.2 + x2 = 0 + 11.2

Reorder the terms:
-11.2 + 11.2 + -2.2x + x2 = 0 + 11.2

Combine like terms: -11.2 + 11.2 = 0.0
0.0 + -2.2x + x2 = 0 + 11.2
-2.2x + x2 = 0 + 11.2

Combine like terms: 0 + 11.2 = 11.2
-2.2x + x2 = 11.2

The x term is -2.2x.  Take half its coefficient (-1.1).
Square it (1.21) and add it to both sides.

Add '1.21' to each side of the equation.
-2.2x + 1.21 + x2 = 11.2 + 1.21

Reorder the terms:
1.21 + -2.2x + x2 = 11.2 + 1.21

Combine like terms: 11.2 + 1.21 = 12.41
1.21 + -2.2x + x2 = 12.41

Factor a perfect square on the left side:
(x + -1.1)(x + -1.1) = 12.41

Calculate the square root of the right side: 3.522782991

Break this problem into two subproblems by setting 
(x + -1.1) equal to 3.522782991 and -3.522782991.

Subproblem 1

x + -1.1 = 3.522782991 Simplifying x + -1.1 = 3.522782991 Reorder the terms: -1.1 + x = 3.522782991 Solving -1.1 + x = 3.522782991 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.1' to each side of the equation. -1.1 + 1.1 + x = 3.522782991 + 1.1 Combine like terms: -1.1 + 1.1 = 0.0 0.0 + x = 3.522782991 + 1.1 x = 3.522782991 + 1.1 Combine like terms: 3.522782991 + 1.1 = 4.622782991 x = 4.622782991 Simplifying x = 4.622782991

Subproblem 2

x + -1.1 = -3.522782991 Simplifying x + -1.1 = -3.522782991 Reorder the terms: -1.1 + x = -3.522782991 Solving -1.1 + x = -3.522782991 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.1' to each side of the equation. -1.1 + 1.1 + x = -3.522782991 + 1.1 Combine like terms: -1.1 + 1.1 = 0.0 0.0 + x = -3.522782991 + 1.1 x = -3.522782991 + 1.1 Combine like terms: -3.522782991 + 1.1 = -2.422782991 x = -2.422782991 Simplifying x = -2.422782991

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.622782991, -2.422782991}

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