(4x+9)(4x+9)=52

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Solution for (4x+9)(4x+9)=52 equation:


Simplifying
(4x + 9)(4x + 9) = 52

Reorder the terms:
(9 + 4x)(4x + 9) = 52

Reorder the terms:
(9 + 4x)(9 + 4x) = 52

Multiply (9 + 4x) * (9 + 4x)
(9(9 + 4x) + 4x * (9 + 4x)) = 52
((9 * 9 + 4x * 9) + 4x * (9 + 4x)) = 52
((81 + 36x) + 4x * (9 + 4x)) = 52
(81 + 36x + (9 * 4x + 4x * 4x)) = 52
(81 + 36x + (36x + 16x2)) = 52

Combine like terms: 36x + 36x = 72x
(81 + 72x + 16x2) = 52

Solving
81 + 72x + 16x2 = 52

Solving for variable 'x'.

Reorder the terms:
81 + -52 + 72x + 16x2 = 52 + -52

Combine like terms: 81 + -52 = 29
29 + 72x + 16x2 = 52 + -52

Combine like terms: 52 + -52 = 0
29 + 72x + 16x2 = 0

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

Divide each side by '16'.
1.8125 + 4.5x + x2 = 0

Move the constant term to the right:

Add '-1.8125' to each side of the equation.
1.8125 + 4.5x + -1.8125 + x2 = 0 + -1.8125

Reorder the terms:
1.8125 + -1.8125 + 4.5x + x2 = 0 + -1.8125

Combine like terms: 1.8125 + -1.8125 = 0.0000
0.0000 + 4.5x + x2 = 0 + -1.8125
4.5x + x2 = 0 + -1.8125

Combine like terms: 0 + -1.8125 = -1.8125
4.5x + x2 = -1.8125

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 = -1.8125 + 5.0625

Reorder the terms:
5.0625 + 4.5x + x2 = -1.8125 + 5.0625

Combine like terms: -1.8125 + 5.0625 = 3.25
5.0625 + 4.5x + x2 = 3.25

Factor a perfect square on the left side:
(x + 2.25)(x + 2.25) = 3.25

Calculate the square root of the right side: 1.802775638

Break this problem into two subproblems by setting 
(x + 2.25) equal to 1.802775638 and -1.802775638.

Subproblem 1

x + 2.25 = 1.802775638 Simplifying x + 2.25 = 1.802775638 Reorder the terms: 2.25 + x = 1.802775638 Solving 2.25 + x = 1.802775638 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 = 1.802775638 + -2.25 Combine like terms: 2.25 + -2.25 = 0.00 0.00 + x = 1.802775638 + -2.25 x = 1.802775638 + -2.25 Combine like terms: 1.802775638 + -2.25 = -0.447224362 x = -0.447224362 Simplifying x = -0.447224362

Subproblem 2

x + 2.25 = -1.802775638 Simplifying x + 2.25 = -1.802775638 Reorder the terms: 2.25 + x = -1.802775638 Solving 2.25 + x = -1.802775638 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 = -1.802775638 + -2.25 Combine like terms: 2.25 + -2.25 = 0.00 0.00 + x = -1.802775638 + -2.25 x = -1.802775638 + -2.25 Combine like terms: -1.802775638 + -2.25 = -4.052775638 x = -4.052775638 Simplifying x = -4.052775638

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.447224362, -4.052775638}

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