x(2x+45)=1246

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Solution for x(2x+45)=1246 equation:


Simplifying
x(2x + 45) = 1246

Reorder the terms:
x(45 + 2x) = 1246
(45 * x + 2x * x) = 1246
(45x + 2x2) = 1246

Solving
45x + 2x2 = 1246

Solving for variable 'x'.

Reorder the terms:
-1246 + 45x + 2x2 = 1246 + -1246

Combine like terms: 1246 + -1246 = 0
-1246 + 45x + 2x2 = 0

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

Divide each side by '2'.
-623 + 22.5x + x2 = 0

Move the constant term to the right:

Add '623' to each side of the equation.
-623 + 22.5x + 623 + x2 = 0 + 623

Reorder the terms:
-623 + 623 + 22.5x + x2 = 0 + 623

Combine like terms: -623 + 623 = 0
0 + 22.5x + x2 = 0 + 623
22.5x + x2 = 0 + 623

Combine like terms: 0 + 623 = 623
22.5x + x2 = 623

The x term is 22.5x.  Take half its coefficient (11.25).
Square it (126.5625) and add it to both sides.

Add '126.5625' to each side of the equation.
22.5x + 126.5625 + x2 = 623 + 126.5625

Reorder the terms:
126.5625 + 22.5x + x2 = 623 + 126.5625

Combine like terms: 623 + 126.5625 = 749.5625
126.5625 + 22.5x + x2 = 749.5625

Factor a perfect square on the left side:
(x + 11.25)(x + 11.25) = 749.5625

Calculate the square root of the right side: 27.378139089

Break this problem into two subproblems by setting 
(x + 11.25) equal to 27.378139089 and -27.378139089.

Subproblem 1

x + 11.25 = 27.378139089 Simplifying x + 11.25 = 27.378139089 Reorder the terms: 11.25 + x = 27.378139089 Solving 11.25 + x = 27.378139089 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-11.25' to each side of the equation. 11.25 + -11.25 + x = 27.378139089 + -11.25 Combine like terms: 11.25 + -11.25 = 0.00 0.00 + x = 27.378139089 + -11.25 x = 27.378139089 + -11.25 Combine like terms: 27.378139089 + -11.25 = 16.128139089 x = 16.128139089 Simplifying x = 16.128139089

Subproblem 2

x + 11.25 = -27.378139089 Simplifying x + 11.25 = -27.378139089 Reorder the terms: 11.25 + x = -27.378139089 Solving 11.25 + x = -27.378139089 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-11.25' to each side of the equation. 11.25 + -11.25 + x = -27.378139089 + -11.25 Combine like terms: 11.25 + -11.25 = 0.00 0.00 + x = -27.378139089 + -11.25 x = -27.378139089 + -11.25 Combine like terms: -27.378139089 + -11.25 = -38.628139089 x = -38.628139089 Simplifying x = -38.628139089

Solution

The solution to the problem is based on the solutions from the subproblems. x = {16.128139089, -38.628139089}

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