8x+5x^2=10000

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Solution for 8x+5x^2=10000 equation:


Simplifying
8x + 5x2 = 10000

Solving
8x + 5x2 = 10000

Solving for variable 'x'.

Reorder the terms:
-10000 + 8x + 5x2 = 10000 + -10000

Combine like terms: 10000 + -10000 = 0
-10000 + 8x + 5x2 = 0

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

Divide each side by '5'.
-2000 + 1.6x + x2 = 0

Move the constant term to the right:

Add '2000' to each side of the equation.
-2000 + 1.6x + 2000 + x2 = 0 + 2000

Reorder the terms:
-2000 + 2000 + 1.6x + x2 = 0 + 2000

Combine like terms: -2000 + 2000 = 0
0 + 1.6x + x2 = 0 + 2000
1.6x + x2 = 0 + 2000

Combine like terms: 0 + 2000 = 2000
1.6x + x2 = 2000

The x term is 1.6x.  Take half its coefficient (0.8).
Square it (0.64) and add it to both sides.

Add '0.64' to each side of the equation.
1.6x + 0.64 + x2 = 2000 + 0.64

Reorder the terms:
0.64 + 1.6x + x2 = 2000 + 0.64

Combine like terms: 2000 + 0.64 = 2000.64
0.64 + 1.6x + x2 = 2000.64

Factor a perfect square on the left side:
(x + 0.8)(x + 0.8) = 2000.64

Calculate the square root of the right side: 44.728514395

Break this problem into two subproblems by setting 
(x + 0.8) equal to 44.728514395 and -44.728514395.

Subproblem 1

x + 0.8 = 44.728514395 Simplifying x + 0.8 = 44.728514395 Reorder the terms: 0.8 + x = 44.728514395 Solving 0.8 + x = 44.728514395 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.8' to each side of the equation. 0.8 + -0.8 + x = 44.728514395 + -0.8 Combine like terms: 0.8 + -0.8 = 0.0 0.0 + x = 44.728514395 + -0.8 x = 44.728514395 + -0.8 Combine like terms: 44.728514395 + -0.8 = 43.928514395 x = 43.928514395 Simplifying x = 43.928514395

Subproblem 2

x + 0.8 = -44.728514395 Simplifying x + 0.8 = -44.728514395 Reorder the terms: 0.8 + x = -44.728514395 Solving 0.8 + x = -44.728514395 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.8' to each side of the equation. 0.8 + -0.8 + x = -44.728514395 + -0.8 Combine like terms: 0.8 + -0.8 = 0.0 0.0 + x = -44.728514395 + -0.8 x = -44.728514395 + -0.8 Combine like terms: -44.728514395 + -0.8 = -45.528514395 x = -45.528514395 Simplifying x = -45.528514395

Solution

The solution to the problem is based on the solutions from the subproblems. x = {43.928514395, -45.528514395}

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