X^2+10X-800=0

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Solution for X^2+10X-800=0 equation:


Simplifying
X2 + 10X + -800 = 0

Reorder the terms:
-800 + 10X + X2 = 0

Solving
-800 + 10X + X2 = 0

Solving for variable 'X'.

Begin completing the square.

Move the constant term to the right:

Add '800' to each side of the equation.
-800 + 10X + 800 + X2 = 0 + 800

Reorder the terms:
-800 + 800 + 10X + X2 = 0 + 800

Combine like terms: -800 + 800 = 0
0 + 10X + X2 = 0 + 800
10X + X2 = 0 + 800

Combine like terms: 0 + 800 = 800
10X + X2 = 800

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 = 800 + 25

Reorder the terms:
25 + 10X + X2 = 800 + 25

Combine like terms: 800 + 25 = 825
25 + 10X + X2 = 825

Factor a perfect square on the left side:
(X + 5)(X + 5) = 825

Calculate the square root of the right side: 28.722813233

Break this problem into two subproblems by setting 
(X + 5) equal to 28.722813233 and -28.722813233.

Subproblem 1

X + 5 = 28.722813233 Simplifying X + 5 = 28.722813233 Reorder the terms: 5 + X = 28.722813233 Solving 5 + X = 28.722813233 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 = 28.722813233 + -5 Combine like terms: 5 + -5 = 0 0 + X = 28.722813233 + -5 X = 28.722813233 + -5 Combine like terms: 28.722813233 + -5 = 23.722813233 X = 23.722813233 Simplifying X = 23.722813233

Subproblem 2

X + 5 = -28.722813233 Simplifying X + 5 = -28.722813233 Reorder the terms: 5 + X = -28.722813233 Solving 5 + X = -28.722813233 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 = -28.722813233 + -5 Combine like terms: 5 + -5 = 0 0 + X = -28.722813233 + -5 X = -28.722813233 + -5 Combine like terms: -28.722813233 + -5 = -33.722813233 X = -33.722813233 Simplifying X = -33.722813233

Solution

The solution to the problem is based on the solutions from the subproblems. X = {23.722813233, -33.722813233}

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