x^2+3x+5=170

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Solution for x^2+3x+5=170 equation:


Simplifying
x2 + 3x + 5 = 170

Reorder the terms:
5 + 3x + x2 = 170

Solving
5 + 3x + x2 = 170

Solving for variable 'x'.

Reorder the terms:
5 + -170 + 3x + x2 = 170 + -170

Combine like terms: 5 + -170 = -165
-165 + 3x + x2 = 170 + -170

Combine like terms: 170 + -170 = 0
-165 + 3x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '165' to each side of the equation.
-165 + 3x + 165 + x2 = 0 + 165

Reorder the terms:
-165 + 165 + 3x + x2 = 0 + 165

Combine like terms: -165 + 165 = 0
0 + 3x + x2 = 0 + 165
3x + x2 = 0 + 165

Combine like terms: 0 + 165 = 165
3x + x2 = 165

The x term is 3x.  Take half its coefficient (1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
3x + 2.25 + x2 = 165 + 2.25

Reorder the terms:
2.25 + 3x + x2 = 165 + 2.25

Combine like terms: 165 + 2.25 = 167.25
2.25 + 3x + x2 = 167.25

Factor a perfect square on the left side:
(x + 1.5)(x + 1.5) = 167.25

Calculate the square root of the right side: 12.932517156

Break this problem into two subproblems by setting 
(x + 1.5) equal to 12.932517156 and -12.932517156.

Subproblem 1

x + 1.5 = 12.932517156 Simplifying x + 1.5 = 12.932517156 Reorder the terms: 1.5 + x = 12.932517156 Solving 1.5 + x = 12.932517156 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.5' to each side of the equation. 1.5 + -1.5 + x = 12.932517156 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + x = 12.932517156 + -1.5 x = 12.932517156 + -1.5 Combine like terms: 12.932517156 + -1.5 = 11.432517156 x = 11.432517156 Simplifying x = 11.432517156

Subproblem 2

x + 1.5 = -12.932517156 Simplifying x + 1.5 = -12.932517156 Reorder the terms: 1.5 + x = -12.932517156 Solving 1.5 + x = -12.932517156 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.5' to each side of the equation. 1.5 + -1.5 + x = -12.932517156 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + x = -12.932517156 + -1.5 x = -12.932517156 + -1.5 Combine like terms: -12.932517156 + -1.5 = -14.432517156 x = -14.432517156 Simplifying x = -14.432517156

Solution

The solution to the problem is based on the solutions from the subproblems. x = {11.432517156, -14.432517156}

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