2x^2+9x-28=184

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Solution for 2x^2+9x-28=184 equation:


Simplifying
2x2 + 9x + -28 = 184

Reorder the terms:
-28 + 9x + 2x2 = 184

Solving
-28 + 9x + 2x2 = 184

Solving for variable 'x'.

Reorder the terms:
-28 + -184 + 9x + 2x2 = 184 + -184

Combine like terms: -28 + -184 = -212
-212 + 9x + 2x2 = 184 + -184

Combine like terms: 184 + -184 = 0
-212 + 9x + 2x2 = 0

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

Divide each side by '2'.
-106 + 4.5x + x2 = 0

Move the constant term to the right:

Add '106' to each side of the equation.
-106 + 4.5x + 106 + x2 = 0 + 106

Reorder the terms:
-106 + 106 + 4.5x + x2 = 0 + 106

Combine like terms: -106 + 106 = 0
0 + 4.5x + x2 = 0 + 106
4.5x + x2 = 0 + 106

Combine like terms: 0 + 106 = 106
4.5x + x2 = 106

The x term is 4.5x.  Take half its coefficient (2.25).
Square it (5.0625) and add it to both sides.

Add '5.0625' to each side of the equation.
4.5x + 5.0625 + x2 = 106 + 5.0625

Reorder the terms:
5.0625 + 4.5x + x2 = 106 + 5.0625

Combine like terms: 106 + 5.0625 = 111.0625
5.0625 + 4.5x + x2 = 111.0625

Factor a perfect square on the left side:
(x + 2.25)(x + 2.25) = 111.0625

Calculate the square root of the right side: 10.538619454

Break this problem into two subproblems by setting 
(x + 2.25) equal to 10.538619454 and -10.538619454.

Subproblem 1

x + 2.25 = 10.538619454 Simplifying x + 2.25 = 10.538619454 Reorder the terms: 2.25 + x = 10.538619454 Solving 2.25 + x = 10.538619454 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.25' to each side of the equation. 2.25 + -2.25 + x = 10.538619454 + -2.25 Combine like terms: 2.25 + -2.25 = 0.00 0.00 + x = 10.538619454 + -2.25 x = 10.538619454 + -2.25 Combine like terms: 10.538619454 + -2.25 = 8.288619454 x = 8.288619454 Simplifying x = 8.288619454

Subproblem 2

x + 2.25 = -10.538619454 Simplifying x + 2.25 = -10.538619454 Reorder the terms: 2.25 + x = -10.538619454 Solving 2.25 + x = -10.538619454 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.25' to each side of the equation. 2.25 + -2.25 + x = -10.538619454 + -2.25 Combine like terms: 2.25 + -2.25 = 0.00 0.00 + x = -10.538619454 + -2.25 x = -10.538619454 + -2.25 Combine like terms: -10.538619454 + -2.25 = -12.788619454 x = -12.788619454 Simplifying x = -12.788619454

Solution

The solution to the problem is based on the solutions from the subproblems. x = {8.288619454, -12.788619454}

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