35=(2x+5)(2x+7)-99

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Solution for 35=(2x+5)(2x+7)-99 equation:


Simplifying
35 = (2x + 5)(2x + 7) + -99

Reorder the terms:
35 = (5 + 2x)(2x + 7) + -99

Reorder the terms:
35 = (5 + 2x)(7 + 2x) + -99

Multiply (5 + 2x) * (7 + 2x)
35 = (5(7 + 2x) + 2x * (7 + 2x)) + -99
35 = ((7 * 5 + 2x * 5) + 2x * (7 + 2x)) + -99
35 = ((35 + 10x) + 2x * (7 + 2x)) + -99
35 = (35 + 10x + (7 * 2x + 2x * 2x)) + -99
35 = (35 + 10x + (14x + 4x2)) + -99

Combine like terms: 10x + 14x = 24x
35 = (35 + 24x + 4x2) + -99

Reorder the terms:
35 = 35 + -99 + 24x + 4x2

Combine like terms: 35 + -99 = -64
35 = -64 + 24x + 4x2

Solving
35 = -64 + 24x + 4x2

Solving for variable 'x'.

Combine like terms: 35 + 64 = 99
99 + -24x + -4x2 = -64 + 24x + 4x2 + 64 + -24x + -4x2

Reorder the terms:
99 + -24x + -4x2 = -64 + 64 + 24x + -24x + 4x2 + -4x2

Combine like terms: -64 + 64 = 0
99 + -24x + -4x2 = 0 + 24x + -24x + 4x2 + -4x2
99 + -24x + -4x2 = 24x + -24x + 4x2 + -4x2

Combine like terms: 24x + -24x = 0
99 + -24x + -4x2 = 0 + 4x2 + -4x2
99 + -24x + -4x2 = 4x2 + -4x2

Combine like terms: 4x2 + -4x2 = 0
99 + -24x + -4x2 = 0

Begin completing the square.  Divide all terms by
-4 the coefficient of the squared term: 

Divide each side by '-4'.
-24.75 + 6x + x2 = 0

Move the constant term to the right:

Add '24.75' to each side of the equation.
-24.75 + 6x + 24.75 + x2 = 0 + 24.75

Reorder the terms:
-24.75 + 24.75 + 6x + x2 = 0 + 24.75

Combine like terms: -24.75 + 24.75 = 0.00
0.00 + 6x + x2 = 0 + 24.75
6x + x2 = 0 + 24.75

Combine like terms: 0 + 24.75 = 24.75
6x + x2 = 24.75

The x term is 6x.  Take half its coefficient (3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
6x + 9 + x2 = 24.75 + 9

Reorder the terms:
9 + 6x + x2 = 24.75 + 9

Combine like terms: 24.75 + 9 = 33.75
9 + 6x + x2 = 33.75

Factor a perfect square on the left side:
(x + 3)(x + 3) = 33.75

Calculate the square root of the right side: 5.809475019

Break this problem into two subproblems by setting 
(x + 3) equal to 5.809475019 and -5.809475019.

Subproblem 1

x + 3 = 5.809475019 Simplifying x + 3 = 5.809475019 Reorder the terms: 3 + x = 5.809475019 Solving 3 + x = 5.809475019 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + x = 5.809475019 + -3 Combine like terms: 3 + -3 = 0 0 + x = 5.809475019 + -3 x = 5.809475019 + -3 Combine like terms: 5.809475019 + -3 = 2.809475019 x = 2.809475019 Simplifying x = 2.809475019

Subproblem 2

x + 3 = -5.809475019 Simplifying x + 3 = -5.809475019 Reorder the terms: 3 + x = -5.809475019 Solving 3 + x = -5.809475019 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + x = -5.809475019 + -3 Combine like terms: 3 + -3 = 0 0 + x = -5.809475019 + -3 x = -5.809475019 + -3 Combine like terms: -5.809475019 + -3 = -8.809475019 x = -8.809475019 Simplifying x = -8.809475019

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.809475019, -8.809475019}

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