10x^2+x+0.1=1000

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Solution for 10x^2+x+0.1=1000 equation:


Simplifying
10x2 + x + 0.1 = 1000

Reorder the terms:
0.1 + x + 10x2 = 1000

Solving
0.1 + x + 10x2 = 1000

Solving for variable 'x'.

Reorder the terms:
0.1 + -1000 + x + 10x2 = 1000 + -1000

Combine like terms: 0.1 + -1000 = -999.9
-999.9 + x + 10x2 = 1000 + -1000

Combine like terms: 1000 + -1000 = 0
-999.9 + x + 10x2 = 0

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

Divide each side by '10'.
-99.99 + 0.1x + x2 = 0

Move the constant term to the right:

Add '99.99' to each side of the equation.
-99.99 + 0.1x + 99.99 + x2 = 0 + 99.99

Reorder the terms:
-99.99 + 99.99 + 0.1x + x2 = 0 + 99.99

Combine like terms: -99.99 + 99.99 = 0.00
0.00 + 0.1x + x2 = 0 + 99.99
0.1x + x2 = 0 + 99.99

Combine like terms: 0 + 99.99 = 99.99
0.1x + x2 = 99.99

The x term is x.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
0.1x + 0.25 + x2 = 99.99 + 0.25

Reorder the terms:
0.25 + 0.1x + x2 = 99.99 + 0.25

Combine like terms: 99.99 + 0.25 = 100.24
0.25 + 0.1x + x2 = 100.24

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 100.24

Calculate the square root of the right side: 10.011992809

Break this problem into two subproblems by setting 
(x + 0.5) equal to 10.011992809 and -10.011992809.

Subproblem 1

x + 0.5 = 10.011992809 Simplifying x + 0.5 = 10.011992809 Reorder the terms: 0.5 + x = 10.011992809 Solving 0.5 + x = 10.011992809 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = 10.011992809 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 10.011992809 + -0.5 x = 10.011992809 + -0.5 Combine like terms: 10.011992809 + -0.5 = 9.511992809 x = 9.511992809 Simplifying x = 9.511992809

Subproblem 2

x + 0.5 = -10.011992809 Simplifying x + 0.5 = -10.011992809 Reorder the terms: 0.5 + x = -10.011992809 Solving 0.5 + x = -10.011992809 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = -10.011992809 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -10.011992809 + -0.5 x = -10.011992809 + -0.5 Combine like terms: -10.011992809 + -0.5 = -10.511992809 x = -10.511992809 Simplifying x = -10.511992809

Solution

The solution to the problem is based on the solutions from the subproblems. x = {9.511992809, -10.511992809}

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