10=x^2-4.06x

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Solution for 10=x^2-4.06x equation:


Simplifying
10 = x2 + -4.06x

Reorder the terms:
10 = -4.06x + x2

Solving
10 = -4.06x + x2

Solving for variable 'x'.

Reorder the terms:
10 + 4.06x + -1x2 = -4.06x + 4.06x + x2 + -1x2

Combine like terms: -4.06x + 4.06x = 0.00
10 + 4.06x + -1x2 = 0.00 + x2 + -1x2
10 + 4.06x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
10 + 4.06x + -1x2 = 0

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

Divide each side by '-1'.
-10 + -4.06x + x2 = 0

Move the constant term to the right:

Add '10' to each side of the equation.
-10 + -4.06x + 10 + x2 = 0 + 10

Reorder the terms:
-10 + 10 + -4.06x + x2 = 0 + 10

Combine like terms: -10 + 10 = 0
0 + -4.06x + x2 = 0 + 10
-4.06x + x2 = 0 + 10

Combine like terms: 0 + 10 = 10
-4.06x + x2 = 10

The x term is -4.06x.  Take half its coefficient (-2.03).
Square it (4.1209) and add it to both sides.

Add '4.1209' to each side of the equation.
-4.06x + 4.1209 + x2 = 10 + 4.1209

Reorder the terms:
4.1209 + -4.06x + x2 = 10 + 4.1209

Combine like terms: 10 + 4.1209 = 14.1209
4.1209 + -4.06x + x2 = 14.1209

Factor a perfect square on the left side:
(x + -2.03)(x + -2.03) = 14.1209

Calculate the square root of the right side: 3.757778599

Break this problem into two subproblems by setting 
(x + -2.03) equal to 3.757778599 and -3.757778599.

Subproblem 1

x + -2.03 = 3.757778599 Simplifying x + -2.03 = 3.757778599 Reorder the terms: -2.03 + x = 3.757778599 Solving -2.03 + x = 3.757778599 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.03' to each side of the equation. -2.03 + 2.03 + x = 3.757778599 + 2.03 Combine like terms: -2.03 + 2.03 = 0.00 0.00 + x = 3.757778599 + 2.03 x = 3.757778599 + 2.03 Combine like terms: 3.757778599 + 2.03 = 5.787778599 x = 5.787778599 Simplifying x = 5.787778599

Subproblem 2

x + -2.03 = -3.757778599 Simplifying x + -2.03 = -3.757778599 Reorder the terms: -2.03 + x = -3.757778599 Solving -2.03 + x = -3.757778599 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.03' to each side of the equation. -2.03 + 2.03 + x = -3.757778599 + 2.03 Combine like terms: -2.03 + 2.03 = 0.00 0.00 + x = -3.757778599 + 2.03 x = -3.757778599 + 2.03 Combine like terms: -3.757778599 + 2.03 = -1.727778599 x = -1.727778599 Simplifying x = -1.727778599

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.787778599, -1.727778599}

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