26=X^2+20X

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Solution for 26=X^2+20X equation:


Simplifying
26 = X2 + 20X

Reorder the terms:
26 = 20X + X2

Solving
26 = 20X + X2

Solving for variable 'X'.

Reorder the terms:
26 + -20X + -1X2 = 20X + -20X + X2 + -1X2

Combine like terms: 20X + -20X = 0
26 + -20X + -1X2 = 0 + X2 + -1X2
26 + -20X + -1X2 = X2 + -1X2

Combine like terms: X2 + -1X2 = 0
26 + -20X + -1X2 = 0

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

Divide each side by '-1'.
-26 + 20X + X2 = 0

Move the constant term to the right:

Add '26' to each side of the equation.
-26 + 20X + 26 + X2 = 0 + 26

Reorder the terms:
-26 + 26 + 20X + X2 = 0 + 26

Combine like terms: -26 + 26 = 0
0 + 20X + X2 = 0 + 26
20X + X2 = 0 + 26

Combine like terms: 0 + 26 = 26
20X + X2 = 26

The X term is 20X.  Take half its coefficient (10).
Square it (100) and add it to both sides.

Add '100' to each side of the equation.
20X + 100 + X2 = 26 + 100

Reorder the terms:
100 + 20X + X2 = 26 + 100

Combine like terms: 26 + 100 = 126
100 + 20X + X2 = 126

Factor a perfect square on the left side:
(X + 10)(X + 10) = 126

Calculate the square root of the right side: 11.22497216

Break this problem into two subproblems by setting 
(X + 10) equal to 11.22497216 and -11.22497216.

Subproblem 1

X + 10 = 11.22497216 Simplifying X + 10 = 11.22497216 Reorder the terms: 10 + X = 11.22497216 Solving 10 + X = 11.22497216 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '-10' to each side of the equation. 10 + -10 + X = 11.22497216 + -10 Combine like terms: 10 + -10 = 0 0 + X = 11.22497216 + -10 X = 11.22497216 + -10 Combine like terms: 11.22497216 + -10 = 1.22497216 X = 1.22497216 Simplifying X = 1.22497216

Subproblem 2

X + 10 = -11.22497216 Simplifying X + 10 = -11.22497216 Reorder the terms: 10 + X = -11.22497216 Solving 10 + X = -11.22497216 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '-10' to each side of the equation. 10 + -10 + X = -11.22497216 + -10 Combine like terms: 10 + -10 = 0 0 + X = -11.22497216 + -10 X = -11.22497216 + -10 Combine like terms: -11.22497216 + -10 = -21.22497216 X = -21.22497216 Simplifying X = -21.22497216

Solution

The solution to the problem is based on the solutions from the subproblems. X = {1.22497216, -21.22497216}

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