(7.3x)(x+2)=4

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Solution for (7.3x)(x+2)=4 equation:


Simplifying
(7.3x)(x + 2) = 4

Remove parenthesis around (7.3x)
7.3x(x + 2) = 4

Reorder the terms:
7.3x(2 + x) = 4
(2 * 7.3x + x * 7.3x) = 4
(14.6x + 7.3x2) = 4

Solving
14.6x + 7.3x2 = 4

Solving for variable 'x'.

Reorder the terms:
-4 + 14.6x + 7.3x2 = 4 + -4

Combine like terms: 4 + -4 = 0
-4 + 14.6x + 7.3x2 = 0

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

Divide each side by '7.3'.
-0.5479452055 + 2x + x2 = 0

Move the constant term to the right:

Add '0.5479452055' to each side of the equation.
-0.5479452055 + 2x + 0.5479452055 + x2 = 0 + 0.5479452055

Reorder the terms:
-0.5479452055 + 0.5479452055 + 2x + x2 = 0 + 0.5479452055

Combine like terms: -0.5479452055 + 0.5479452055 = 0.0000000000
0.0000000000 + 2x + x2 = 0 + 0.5479452055
2x + x2 = 0 + 0.5479452055

Combine like terms: 0 + 0.5479452055 = 0.5479452055
2x + x2 = 0.5479452055

The x term is 2x.  Take half its coefficient (1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
2x + 1 + x2 = 0.5479452055 + 1

Reorder the terms:
1 + 2x + x2 = 0.5479452055 + 1

Combine like terms: 0.5479452055 + 1 = 1.5479452055
1 + 2x + x2 = 1.5479452055

Factor a perfect square on the left side:
(x + 1)(x + 1) = 1.5479452055

Calculate the square root of the right side: 1.244164461

Break this problem into two subproblems by setting 
(x + 1) equal to 1.244164461 and -1.244164461.

Subproblem 1

x + 1 = 1.244164461 Simplifying x + 1 = 1.244164461 Reorder the terms: 1 + x = 1.244164461 Solving 1 + x = 1.244164461 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = 1.244164461 + -1 Combine like terms: 1 + -1 = 0 0 + x = 1.244164461 + -1 x = 1.244164461 + -1 Combine like terms: 1.244164461 + -1 = 0.244164461 x = 0.244164461 Simplifying x = 0.244164461

Subproblem 2

x + 1 = -1.244164461 Simplifying x + 1 = -1.244164461 Reorder the terms: 1 + x = -1.244164461 Solving 1 + x = -1.244164461 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = -1.244164461 + -1 Combine like terms: 1 + -1 = 0 0 + x = -1.244164461 + -1 x = -1.244164461 + -1 Combine like terms: -1.244164461 + -1 = -2.244164461 x = -2.244164461 Simplifying x = -2.244164461

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.244164461, -2.244164461}

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