x^2+5x-170=0

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Solution for x^2+5x-170=0 equation:


Simplifying
x2 + 5x + -170 = 0

Reorder the terms:
-170 + 5x + x2 = 0

Solving
-170 + 5x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '170' to each side of the equation.
-170 + 5x + 170 + x2 = 0 + 170

Reorder the terms:
-170 + 170 + 5x + x2 = 0 + 170

Combine like terms: -170 + 170 = 0
0 + 5x + x2 = 0 + 170
5x + x2 = 0 + 170

Combine like terms: 0 + 170 = 170
5x + x2 = 170

The x term is 5x.  Take half its coefficient (2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
5x + 6.25 + x2 = 170 + 6.25

Reorder the terms:
6.25 + 5x + x2 = 170 + 6.25

Combine like terms: 170 + 6.25 = 176.25
6.25 + 5x + x2 = 176.25

Factor a perfect square on the left side:
(x + 2.5)(x + 2.5) = 176.25

Calculate the square root of the right side: 13.275918047

Break this problem into two subproblems by setting 
(x + 2.5) equal to 13.275918047 and -13.275918047.

Subproblem 1

x + 2.5 = 13.275918047 Simplifying x + 2.5 = 13.275918047 Reorder the terms: 2.5 + x = 13.275918047 Solving 2.5 + x = 13.275918047 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + x = 13.275918047 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + x = 13.275918047 + -2.5 x = 13.275918047 + -2.5 Combine like terms: 13.275918047 + -2.5 = 10.775918047 x = 10.775918047 Simplifying x = 10.775918047

Subproblem 2

x + 2.5 = -13.275918047 Simplifying x + 2.5 = -13.275918047 Reorder the terms: 2.5 + x = -13.275918047 Solving 2.5 + x = -13.275918047 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + x = -13.275918047 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + x = -13.275918047 + -2.5 x = -13.275918047 + -2.5 Combine like terms: -13.275918047 + -2.5 = -15.775918047 x = -15.775918047 Simplifying x = -15.775918047

Solution

The solution to the problem is based on the solutions from the subproblems. x = {10.775918047, -15.775918047}

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