5x^2=38x+56

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Solution for 5x^2=38x+56 equation:


Simplifying
5x2 = 38x + 56

Reorder the terms:
5x2 = 56 + 38x

Solving
5x2 = 56 + 38x

Solving for variable 'x'.

Reorder the terms:
-56 + -38x + 5x2 = 56 + 38x + -56 + -38x

Reorder the terms:
-56 + -38x + 5x2 = 56 + -56 + 38x + -38x

Combine like terms: 56 + -56 = 0
-56 + -38x + 5x2 = 0 + 38x + -38x
-56 + -38x + 5x2 = 38x + -38x

Combine like terms: 38x + -38x = 0
-56 + -38x + 5x2 = 0

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

Divide each side by '5'.
-11.2 + -7.6x + x2 = 0

Move the constant term to the right:

Add '11.2' to each side of the equation.
-11.2 + -7.6x + 11.2 + x2 = 0 + 11.2

Reorder the terms:
-11.2 + 11.2 + -7.6x + x2 = 0 + 11.2

Combine like terms: -11.2 + 11.2 = 0.0
0.0 + -7.6x + x2 = 0 + 11.2
-7.6x + x2 = 0 + 11.2

Combine like terms: 0 + 11.2 = 11.2
-7.6x + x2 = 11.2

The x term is -7.6x.  Take half its coefficient (-3.8).
Square it (14.44) and add it to both sides.

Add '14.44' to each side of the equation.
-7.6x + 14.44 + x2 = 11.2 + 14.44

Reorder the terms:
14.44 + -7.6x + x2 = 11.2 + 14.44

Combine like terms: 11.2 + 14.44 = 25.64
14.44 + -7.6x + x2 = 25.64

Factor a perfect square on the left side:
(x + -3.8)(x + -3.8) = 25.64

Calculate the square root of the right side: 5.06359556

Break this problem into two subproblems by setting 
(x + -3.8) equal to 5.06359556 and -5.06359556.

Subproblem 1

x + -3.8 = 5.06359556 Simplifying x + -3.8 = 5.06359556 Reorder the terms: -3.8 + x = 5.06359556 Solving -3.8 + x = 5.06359556 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.8' to each side of the equation. -3.8 + 3.8 + x = 5.06359556 + 3.8 Combine like terms: -3.8 + 3.8 = 0.0 0.0 + x = 5.06359556 + 3.8 x = 5.06359556 + 3.8 Combine like terms: 5.06359556 + 3.8 = 8.86359556 x = 8.86359556 Simplifying x = 8.86359556

Subproblem 2

x + -3.8 = -5.06359556 Simplifying x + -3.8 = -5.06359556 Reorder the terms: -3.8 + x = -5.06359556 Solving -3.8 + x = -5.06359556 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.8' to each side of the equation. -3.8 + 3.8 + x = -5.06359556 + 3.8 Combine like terms: -3.8 + 3.8 = 0.0 0.0 + x = -5.06359556 + 3.8 x = -5.06359556 + 3.8 Combine like terms: -5.06359556 + 3.8 = -1.26359556 x = -1.26359556 Simplifying x = -1.26359556

Solution

The solution to the problem is based on the solutions from the subproblems. x = {8.86359556, -1.26359556}

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