(X+5)(X+2)=117

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Solution for (X+5)(X+2)=117 equation:


Simplifying
(X + 5)(X + 2) = 117

Reorder the terms:
(5 + X)(X + 2) = 117

Reorder the terms:
(5 + X)(2 + X) = 117

Multiply (5 + X) * (2 + X)
(5(2 + X) + X(2 + X)) = 117
((2 * 5 + X * 5) + X(2 + X)) = 117
((10 + 5X) + X(2 + X)) = 117
(10 + 5X + (2 * X + X * X)) = 117
(10 + 5X + (2X + X2)) = 117

Combine like terms: 5X + 2X = 7X
(10 + 7X + X2) = 117

Solving
10 + 7X + X2 = 117

Solving for variable 'X'.

Reorder the terms:
10 + -117 + 7X + X2 = 117 + -117

Combine like terms: 10 + -117 = -107
-107 + 7X + X2 = 117 + -117

Combine like terms: 117 + -117 = 0
-107 + 7X + X2 = 0

Begin completing the square.

Move the constant term to the right:

Add '107' to each side of the equation.
-107 + 7X + 107 + X2 = 0 + 107

Reorder the terms:
-107 + 107 + 7X + X2 = 0 + 107

Combine like terms: -107 + 107 = 0
0 + 7X + X2 = 0 + 107
7X + X2 = 0 + 107

Combine like terms: 0 + 107 = 107
7X + X2 = 107

The X term is 7X.  Take half its coefficient (3.5).
Square it (12.25) and add it to both sides.

Add '12.25' to each side of the equation.
7X + 12.25 + X2 = 107 + 12.25

Reorder the terms:
12.25 + 7X + X2 = 107 + 12.25

Combine like terms: 107 + 12.25 = 119.25
12.25 + 7X + X2 = 119.25

Factor a perfect square on the left side:
(X + 3.5)(X + 3.5) = 119.25

Calculate the square root of the right side: 10.920164834

Break this problem into two subproblems by setting 
(X + 3.5) equal to 10.920164834 and -10.920164834.

Subproblem 1

X + 3.5 = 10.920164834 Simplifying X + 3.5 = 10.920164834 Reorder the terms: 3.5 + X = 10.920164834 Solving 3.5 + X = 10.920164834 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '-3.5' to each side of the equation. 3.5 + -3.5 + X = 10.920164834 + -3.5 Combine like terms: 3.5 + -3.5 = 0.0 0.0 + X = 10.920164834 + -3.5 X = 10.920164834 + -3.5 Combine like terms: 10.920164834 + -3.5 = 7.420164834 X = 7.420164834 Simplifying X = 7.420164834

Subproblem 2

X + 3.5 = -10.920164834 Simplifying X + 3.5 = -10.920164834 Reorder the terms: 3.5 + X = -10.920164834 Solving 3.5 + X = -10.920164834 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '-3.5' to each side of the equation. 3.5 + -3.5 + X = -10.920164834 + -3.5 Combine like terms: 3.5 + -3.5 = 0.0 0.0 + X = -10.920164834 + -3.5 X = -10.920164834 + -3.5 Combine like terms: -10.920164834 + -3.5 = -14.420164834 X = -14.420164834 Simplifying X = -14.420164834

Solution

The solution to the problem is based on the solutions from the subproblems. X = {7.420164834, -14.420164834}

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