x^2+10x-13=17

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Solution for x^2+10x-13=17 equation:


Simplifying
x2 + 10x + -13 = 17

Reorder the terms:
-13 + 10x + x2 = 17

Solving
-13 + 10x + x2 = 17

Solving for variable 'x'.

Reorder the terms:
-13 + -17 + 10x + x2 = 17 + -17

Combine like terms: -13 + -17 = -30
-30 + 10x + x2 = 17 + -17

Combine like terms: 17 + -17 = 0
-30 + 10x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '30' to each side of the equation.
-30 + 10x + 30 + x2 = 0 + 30

Reorder the terms:
-30 + 30 + 10x + x2 = 0 + 30

Combine like terms: -30 + 30 = 0
0 + 10x + x2 = 0 + 30
10x + x2 = 0 + 30

Combine like terms: 0 + 30 = 30
10x + x2 = 30

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 = 30 + 25

Reorder the terms:
25 + 10x + x2 = 30 + 25

Combine like terms: 30 + 25 = 55
25 + 10x + x2 = 55

Factor a perfect square on the left side:
(x + 5)(x + 5) = 55

Calculate the square root of the right side: 7.416198487

Break this problem into two subproblems by setting 
(x + 5) equal to 7.416198487 and -7.416198487.

Subproblem 1

x + 5 = 7.416198487 Simplifying x + 5 = 7.416198487 Reorder the terms: 5 + x = 7.416198487 Solving 5 + x = 7.416198487 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 = 7.416198487 + -5 Combine like terms: 5 + -5 = 0 0 + x = 7.416198487 + -5 x = 7.416198487 + -5 Combine like terms: 7.416198487 + -5 = 2.416198487 x = 2.416198487 Simplifying x = 2.416198487

Subproblem 2

x + 5 = -7.416198487 Simplifying x + 5 = -7.416198487 Reorder the terms: 5 + x = -7.416198487 Solving 5 + x = -7.416198487 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 = -7.416198487 + -5 Combine like terms: 5 + -5 = 0 0 + x = -7.416198487 + -5 x = -7.416198487 + -5 Combine like terms: -7.416198487 + -5 = -12.416198487 x = -12.416198487 Simplifying x = -12.416198487

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.416198487, -12.416198487}

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