175=(x+2)x+5

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Solution for 175=(x+2)x+5 equation:


Simplifying
175 = (x + 2) * x + 5

Reorder the terms:
175 = (2 + x) * x + 5

Reorder the terms for easier multiplication:
175 = x(2 + x) + 5
175 = (2 * x + x * x) + 5
175 = (2x + x2) + 5

Reorder the terms:
175 = 5 + 2x + x2

Solving
175 = 5 + 2x + x2

Solving for variable 'x'.

Combine like terms: 175 + -5 = 170
170 + -2x + -1x2 = 5 + 2x + x2 + -5 + -2x + -1x2

Reorder the terms:
170 + -2x + -1x2 = 5 + -5 + 2x + -2x + x2 + -1x2

Combine like terms: 5 + -5 = 0
170 + -2x + -1x2 = 0 + 2x + -2x + x2 + -1x2
170 + -2x + -1x2 = 2x + -2x + x2 + -1x2

Combine like terms: 2x + -2x = 0
170 + -2x + -1x2 = 0 + x2 + -1x2
170 + -2x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
170 + -2x + -1x2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-170 + 2x + x2 = 0

Move the constant term to the right:

Add '170' to each side of the equation.
-170 + 2x + 170 + x2 = 0 + 170

Reorder the terms:
-170 + 170 + 2x + x2 = 0 + 170

Combine like terms: -170 + 170 = 0
0 + 2x + x2 = 0 + 170
2x + x2 = 0 + 170

Combine like terms: 0 + 170 = 170
2x + x2 = 170

The x term is 2x.  Take half its coefficient (1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
2x + 1 + x2 = 170 + 1

Reorder the terms:
1 + 2x + x2 = 170 + 1

Combine like terms: 170 + 1 = 171
1 + 2x + x2 = 171

Factor a perfect square on the left side:
(x + 1)(x + 1) = 171

Calculate the square root of the right side: 13.076696831

Break this problem into two subproblems by setting 
(x + 1) equal to 13.076696831 and -13.076696831.

Subproblem 1

x + 1 = 13.076696831 Simplifying x + 1 = 13.076696831 Reorder the terms: 1 + x = 13.076696831 Solving 1 + x = 13.076696831 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = 13.076696831 + -1 Combine like terms: 1 + -1 = 0 0 + x = 13.076696831 + -1 x = 13.076696831 + -1 Combine like terms: 13.076696831 + -1 = 12.076696831 x = 12.076696831 Simplifying x = 12.076696831

Subproblem 2

x + 1 = -13.076696831 Simplifying x + 1 = -13.076696831 Reorder the terms: 1 + x = -13.076696831 Solving 1 + x = -13.076696831 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = -13.076696831 + -1 Combine like terms: 1 + -1 = 0 0 + x = -13.076696831 + -1 x = -13.076696831 + -1 Combine like terms: -13.076696831 + -1 = -14.076696831 x = -14.076696831 Simplifying x = -14.076696831

Solution

The solution to the problem is based on the solutions from the subproblems. x = {12.076696831, -14.076696831}

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