5.7=10x+x^2

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Solution for 5.7=10x+x^2 equation:


Simplifying
5.7 = 10x + x2

Solving
5.7 = 10x + x2

Solving for variable 'x'.

Reorder the terms:
5.7 + -10x + -1x2 = 10x + -10x + x2 + -1x2

Combine like terms: 10x + -10x = 0
5.7 + -10x + -1x2 = 0 + x2 + -1x2
5.7 + -10x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
5.7 + -10x + -1x2 = 0

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

Divide each side by '-1'.
-5.7 + 10x + x2 = 0

Move the constant term to the right:

Add '5.7' to each side of the equation.
-5.7 + 10x + 5.7 + x2 = 0 + 5.7

Reorder the terms:
-5.7 + 5.7 + 10x + x2 = 0 + 5.7

Combine like terms: -5.7 + 5.7 = 0.0
0.0 + 10x + x2 = 0 + 5.7
10x + x2 = 0 + 5.7

Combine like terms: 0 + 5.7 = 5.7
10x + x2 = 5.7

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 = 5.7 + 25

Reorder the terms:
25 + 10x + x2 = 5.7 + 25

Combine like terms: 5.7 + 25 = 30.7
25 + 10x + x2 = 30.7

Factor a perfect square on the left side:
(x + 5)(x + 5) = 30.7

Calculate the square root of the right side: 5.540758071

Break this problem into two subproblems by setting 
(x + 5) equal to 5.540758071 and -5.540758071.

Subproblem 1

x + 5 = 5.540758071 Simplifying x + 5 = 5.540758071 Reorder the terms: 5 + x = 5.540758071 Solving 5 + x = 5.540758071 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 = 5.540758071 + -5 Combine like terms: 5 + -5 = 0 0 + x = 5.540758071 + -5 x = 5.540758071 + -5 Combine like terms: 5.540758071 + -5 = 0.540758071 x = 0.540758071 Simplifying x = 0.540758071

Subproblem 2

x + 5 = -5.540758071 Simplifying x + 5 = -5.540758071 Reorder the terms: 5 + x = -5.540758071 Solving 5 + x = -5.540758071 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 = -5.540758071 + -5 Combine like terms: 5 + -5 = 0 0 + x = -5.540758071 + -5 x = -5.540758071 + -5 Combine like terms: -5.540758071 + -5 = -10.540758071 x = -10.540758071 Simplifying x = -10.540758071

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.540758071, -10.540758071}

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