(x+12)(x+7)=92

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Solution for (x+12)(x+7)=92 equation:


Simplifying
(x + 12)(x + 7) = 92

Reorder the terms:
(12 + x)(x + 7) = 92

Reorder the terms:
(12 + x)(7 + x) = 92

Multiply (12 + x) * (7 + x)
(12(7 + x) + x(7 + x)) = 92
((7 * 12 + x * 12) + x(7 + x)) = 92
((84 + 12x) + x(7 + x)) = 92
(84 + 12x + (7 * x + x * x)) = 92
(84 + 12x + (7x + x2)) = 92

Combine like terms: 12x + 7x = 19x
(84 + 19x + x2) = 92

Solving
84 + 19x + x2 = 92

Solving for variable 'x'.

Reorder the terms:
84 + -92 + 19x + x2 = 92 + -92

Combine like terms: 84 + -92 = -8
-8 + 19x + x2 = 92 + -92

Combine like terms: 92 + -92 = 0
-8 + 19x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '8' to each side of the equation.
-8 + 19x + 8 + x2 = 0 + 8

Reorder the terms:
-8 + 8 + 19x + x2 = 0 + 8

Combine like terms: -8 + 8 = 0
0 + 19x + x2 = 0 + 8
19x + x2 = 0 + 8

Combine like terms: 0 + 8 = 8
19x + x2 = 8

The x term is 19x.  Take half its coefficient (9.5).
Square it (90.25) and add it to both sides.

Add '90.25' to each side of the equation.
19x + 90.25 + x2 = 8 + 90.25

Reorder the terms:
90.25 + 19x + x2 = 8 + 90.25

Combine like terms: 8 + 90.25 = 98.25
90.25 + 19x + x2 = 98.25

Factor a perfect square on the left side:
(x + 9.5)(x + 9.5) = 98.25

Calculate the square root of the right side: 9.912113801

Break this problem into two subproblems by setting 
(x + 9.5) equal to 9.912113801 and -9.912113801.

Subproblem 1

x + 9.5 = 9.912113801 Simplifying x + 9.5 = 9.912113801 Reorder the terms: 9.5 + x = 9.912113801 Solving 9.5 + x = 9.912113801 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-9.5' to each side of the equation. 9.5 + -9.5 + x = 9.912113801 + -9.5 Combine like terms: 9.5 + -9.5 = 0.0 0.0 + x = 9.912113801 + -9.5 x = 9.912113801 + -9.5 Combine like terms: 9.912113801 + -9.5 = 0.412113801 x = 0.412113801 Simplifying x = 0.412113801

Subproblem 2

x + 9.5 = -9.912113801 Simplifying x + 9.5 = -9.912113801 Reorder the terms: 9.5 + x = -9.912113801 Solving 9.5 + x = -9.912113801 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-9.5' to each side of the equation. 9.5 + -9.5 + x = -9.912113801 + -9.5 Combine like terms: 9.5 + -9.5 = 0.0 0.0 + x = -9.912113801 + -9.5 x = -9.912113801 + -9.5 Combine like terms: -9.912113801 + -9.5 = -19.412113801 x = -19.412113801 Simplifying x = -19.412113801

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.412113801, -19.412113801}

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