X^2+7X-112=0

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Solution for X^2+7X-112=0 equation:


Simplifying
X2 + 7X + -112 = 0

Reorder the terms:
-112 + 7X + X2 = 0

Solving
-112 + 7X + X2 = 0

Solving for variable 'X'.

Begin completing the square.

Move the constant term to the right:

Add '112' to each side of the equation.
-112 + 7X + 112 + X2 = 0 + 112

Reorder the terms:
-112 + 112 + 7X + X2 = 0 + 112

Combine like terms: -112 + 112 = 0
0 + 7X + X2 = 0 + 112
7X + X2 = 0 + 112

Combine like terms: 0 + 112 = 112
7X + X2 = 112

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 = 112 + 12.25

Reorder the terms:
12.25 + 7X + X2 = 112 + 12.25

Combine like terms: 112 + 12.25 = 124.25
12.25 + 7X + X2 = 124.25

Factor a perfect square on the left side:
(X + 3.5)(X + 3.5) = 124.25

Calculate the square root of the right side: 11.146748405

Break this problem into two subproblems by setting 
(X + 3.5) equal to 11.146748405 and -11.146748405.

Subproblem 1

X + 3.5 = 11.146748405 Simplifying X + 3.5 = 11.146748405 Reorder the terms: 3.5 + X = 11.146748405 Solving 3.5 + X = 11.146748405 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 = 11.146748405 + -3.5 Combine like terms: 3.5 + -3.5 = 0.0 0.0 + X = 11.146748405 + -3.5 X = 11.146748405 + -3.5 Combine like terms: 11.146748405 + -3.5 = 7.646748405 X = 7.646748405 Simplifying X = 7.646748405

Subproblem 2

X + 3.5 = -11.146748405 Simplifying X + 3.5 = -11.146748405 Reorder the terms: 3.5 + X = -11.146748405 Solving 3.5 + X = -11.146748405 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 = -11.146748405 + -3.5 Combine like terms: 3.5 + -3.5 = 0.0 0.0 + X = -11.146748405 + -3.5 X = -11.146748405 + -3.5 Combine like terms: -11.146748405 + -3.5 = -14.646748405 X = -14.646748405 Simplifying X = -14.646748405

Solution

The solution to the problem is based on the solutions from the subproblems. X = {7.646748405, -14.646748405}

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