x^2+10x-5=9

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Solution for x^2+10x-5=9 equation:


Simplifying
x2 + 10x + -5 = 9

Reorder the terms:
-5 + 10x + x2 = 9

Solving
-5 + 10x + x2 = 9

Solving for variable 'x'.

Reorder the terms:
-5 + -9 + 10x + x2 = 9 + -9

Combine like terms: -5 + -9 = -14
-14 + 10x + x2 = 9 + -9

Combine like terms: 9 + -9 = 0
-14 + 10x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '14' to each side of the equation.
-14 + 10x + 14 + x2 = 0 + 14

Reorder the terms:
-14 + 14 + 10x + x2 = 0 + 14

Combine like terms: -14 + 14 = 0
0 + 10x + x2 = 0 + 14
10x + x2 = 0 + 14

Combine like terms: 0 + 14 = 14
10x + x2 = 14

The x term is 10x.  Take half its coefficient (5).
Square it (25) and add it to both sides.

Add '25' to each side of the equation.
10x + 25 + x2 = 14 + 25

Reorder the terms:
25 + 10x + x2 = 14 + 25

Combine like terms: 14 + 25 = 39
25 + 10x + x2 = 39

Factor a perfect square on the left side:
(x + 5)(x + 5) = 39

Calculate the square root of the right side: 6.244997998

Break this problem into two subproblems by setting 
(x + 5) equal to 6.244997998 and -6.244997998.

Subproblem 1

x + 5 = 6.244997998 Simplifying x + 5 = 6.244997998 Reorder the terms: 5 + x = 6.244997998 Solving 5 + x = 6.244997998 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + x = 6.244997998 + -5 Combine like terms: 5 + -5 = 0 0 + x = 6.244997998 + -5 x = 6.244997998 + -5 Combine like terms: 6.244997998 + -5 = 1.244997998 x = 1.244997998 Simplifying x = 1.244997998

Subproblem 2

x + 5 = -6.244997998 Simplifying x + 5 = -6.244997998 Reorder the terms: 5 + x = -6.244997998 Solving 5 + x = -6.244997998 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + x = -6.244997998 + -5 Combine like terms: 5 + -5 = 0 0 + x = -6.244997998 + -5 x = -6.244997998 + -5 Combine like terms: -6.244997998 + -5 = -11.244997998 x = -11.244997998 Simplifying x = -11.244997998

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.244997998, -11.244997998}

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