.17=2x+x^2

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Solution for .17=2x+x^2 equation:


Simplifying
0.17 = 2x + x2

Solving
0.17 = 2x + x2

Solving for variable 'x'.

Reorder the terms:
0.17 + -2x + -1x2 = 2x + -2x + x2 + -1x2

Combine like terms: 2x + -2x = 0
0.17 + -2x + -1x2 = 0 + x2 + -1x2
0.17 + -2x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
0.17 + -2x + -1x2 = 0

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

Divide each side by '-1'.
-0.17 + 2x + x2 = 0

Move the constant term to the right:

Add '0.17' to each side of the equation.
-0.17 + 2x + 0.17 + x2 = 0 + 0.17

Reorder the terms:
-0.17 + 0.17 + 2x + x2 = 0 + 0.17

Combine like terms: -0.17 + 0.17 = 0.00
0.00 + 2x + x2 = 0 + 0.17
2x + x2 = 0 + 0.17

Combine like terms: 0 + 0.17 = 0.17
2x + x2 = 0.17

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 = 0.17 + 1

Reorder the terms:
1 + 2x + x2 = 0.17 + 1

Combine like terms: 0.17 + 1 = 1.17
1 + 2x + x2 = 1.17

Factor a perfect square on the left side:
(x + 1)(x + 1) = 1.17

Calculate the square root of the right side: 1.081665383

Break this problem into two subproblems by setting 
(x + 1) equal to 1.081665383 and -1.081665383.

Subproblem 1

x + 1 = 1.081665383 Simplifying x + 1 = 1.081665383 Reorder the terms: 1 + x = 1.081665383 Solving 1 + x = 1.081665383 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 = 1.081665383 + -1 Combine like terms: 1 + -1 = 0 0 + x = 1.081665383 + -1 x = 1.081665383 + -1 Combine like terms: 1.081665383 + -1 = 0.081665383 x = 0.081665383 Simplifying x = 0.081665383

Subproblem 2

x + 1 = -1.081665383 Simplifying x + 1 = -1.081665383 Reorder the terms: 1 + x = -1.081665383 Solving 1 + x = -1.081665383 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 = -1.081665383 + -1 Combine like terms: 1 + -1 = 0 0 + x = -1.081665383 + -1 x = -1.081665383 + -1 Combine like terms: -1.081665383 + -1 = -2.081665383 x = -2.081665383 Simplifying x = -2.081665383

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.081665383, -2.081665383}

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