2.5(x+4)*5x+3*5x=53.5

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Solution for 2.5(x+4)*5x+3*5x=53.5 equation:


Simplifying
2.5(x + 4) * 5x + 3 * 5x = 53.5

Reorder the terms:
2.5(4 + x) * 5x + 3 * 5x = 53.5

Reorder the terms for easier multiplication:
2.5 * 5x(4 + x) + 3 * 5x = 53.5

Multiply 2.5 * 5
12.5x(4 + x) + 3 * 5x = 53.5
(4 * 12.5x + x * 12.5x) + 3 * 5x = 53.5
(50x + 12.5x2) + 3 * 5x = 53.5

Multiply 3 * 5
50x + 12.5x2 + 15x = 53.5

Reorder the terms:
50x + 15x + 12.5x2 = 53.5

Combine like terms: 50x + 15x = 65x
65x + 12.5x2 = 53.5

Solving
65x + 12.5x2 = 53.5

Solving for variable 'x'.

Reorder the terms:
-53.5 + 65x + 12.5x2 = 53.5 + -53.5

Combine like terms: 53.5 + -53.5 = 0.0
-53.5 + 65x + 12.5x2 = 0.0

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

Divide each side by '12.5'.
-4.28 + 5.2x + x2 = 0

Move the constant term to the right:

Add '4.28' to each side of the equation.
-4.28 + 5.2x + 4.28 + x2 = 0 + 4.28

Reorder the terms:
-4.28 + 4.28 + 5.2x + x2 = 0 + 4.28

Combine like terms: -4.28 + 4.28 = 0.00
0.00 + 5.2x + x2 = 0 + 4.28
5.2x + x2 = 0 + 4.28

Combine like terms: 0 + 4.28 = 4.28
5.2x + x2 = 4.28

The x term is 5.2x.  Take half its coefficient (2.6).
Square it (6.76) and add it to both sides.

Add '6.76' to each side of the equation.
5.2x + 6.76 + x2 = 4.28 + 6.76

Reorder the terms:
6.76 + 5.2x + x2 = 4.28 + 6.76

Combine like terms: 4.28 + 6.76 = 11.04
6.76 + 5.2x + x2 = 11.04

Factor a perfect square on the left side:
(x + 2.6)(x + 2.6) = 11.04

Calculate the square root of the right side: 3.322649545

Break this problem into two subproblems by setting 
(x + 2.6) equal to 3.322649545 and -3.322649545.

Subproblem 1

x + 2.6 = 3.322649545 Simplifying x + 2.6 = 3.322649545 Reorder the terms: 2.6 + x = 3.322649545 Solving 2.6 + x = 3.322649545 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.6' to each side of the equation. 2.6 + -2.6 + x = 3.322649545 + -2.6 Combine like terms: 2.6 + -2.6 = 0.0 0.0 + x = 3.322649545 + -2.6 x = 3.322649545 + -2.6 Combine like terms: 3.322649545 + -2.6 = 0.722649545 x = 0.722649545 Simplifying x = 0.722649545

Subproblem 2

x + 2.6 = -3.322649545 Simplifying x + 2.6 = -3.322649545 Reorder the terms: 2.6 + x = -3.322649545 Solving 2.6 + x = -3.322649545 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.6' to each side of the equation. 2.6 + -2.6 + x = -3.322649545 + -2.6 Combine like terms: 2.6 + -2.6 = 0.0 0.0 + x = -3.322649545 + -2.6 x = -3.322649545 + -2.6 Combine like terms: -3.322649545 + -2.6 = -5.922649545 x = -5.922649545 Simplifying x = -5.922649545

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.722649545, -5.922649545}

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