(2x+3.75)x-0.5=11.5

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Solution for (2x+3.75)x-0.5=11.5 equation:


Simplifying
(2x + 3.75) * x + -0.5 = 11.5

Reorder the terms:
(3.75 + 2x) * x + -0.5 = 11.5

Reorder the terms for easier multiplication:
x(3.75 + 2x) + -0.5 = 11.5
(3.75 * x + 2x * x) + -0.5 = 11.5
(3.75x + 2x2) + -0.5 = 11.5

Reorder the terms:
-0.5 + 3.75x + 2x2 = 11.5

Solving
-0.5 + 3.75x + 2x2 = 11.5

Solving for variable 'x'.

Reorder the terms:
-0.5 + -11.5 + 3.75x + 2x2 = 11.5 + -11.5

Combine like terms: -0.5 + -11.5 = -12
-12 + 3.75x + 2x2 = 11.5 + -11.5

Combine like terms: 11.5 + -11.5 = 0.0
-12 + 3.75x + 2x2 = 0.0

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

Divide each side by '2'.
-6 + 1.875x + x2 = 0.0

Move the constant term to the right:

Add '6' to each side of the equation.
-6 + 1.875x + 6 + x2 = 0.0 + 6

Reorder the terms:
-6 + 6 + 1.875x + x2 = 0.0 + 6

Combine like terms: -6 + 6 = 0
0 + 1.875x + x2 = 0.0 + 6
1.875x + x2 = 0.0 + 6

Combine like terms: 0.0 + 6 = 6
1.875x + x2 = 6

The x term is 1.875x.  Take half its coefficient (0.9375).
Square it (0.87890625) and add it to both sides.

Add '0.87890625' to each side of the equation.
1.875x + 0.87890625 + x2 = 6 + 0.87890625

Reorder the terms:
0.87890625 + 1.875x + x2 = 6 + 0.87890625

Combine like terms: 6 + 0.87890625 = 6.87890625
0.87890625 + 1.875x + x2 = 6.87890625

Factor a perfect square on the left side:
(x + 0.9375)(x + 0.9375) = 6.87890625

Calculate the square root of the right side: 2.622766907

Break this problem into two subproblems by setting 
(x + 0.9375) equal to 2.622766907 and -2.622766907.

Subproblem 1

x + 0.9375 = 2.622766907 Simplifying x + 0.9375 = 2.622766907 Reorder the terms: 0.9375 + x = 2.622766907 Solving 0.9375 + x = 2.622766907 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.9375' to each side of the equation. 0.9375 + -0.9375 + x = 2.622766907 + -0.9375 Combine like terms: 0.9375 + -0.9375 = 0.0000 0.0000 + x = 2.622766907 + -0.9375 x = 2.622766907 + -0.9375 Combine like terms: 2.622766907 + -0.9375 = 1.685266907 x = 1.685266907 Simplifying x = 1.685266907

Subproblem 2

x + 0.9375 = -2.622766907 Simplifying x + 0.9375 = -2.622766907 Reorder the terms: 0.9375 + x = -2.622766907 Solving 0.9375 + x = -2.622766907 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.9375' to each side of the equation. 0.9375 + -0.9375 + x = -2.622766907 + -0.9375 Combine like terms: 0.9375 + -0.9375 = 0.0000 0.0000 + x = -2.622766907 + -0.9375 x = -2.622766907 + -0.9375 Combine like terms: -2.622766907 + -0.9375 = -3.560266907 x = -3.560266907 Simplifying x = -3.560266907

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.685266907, -3.560266907}

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