0.25X^2+6X=31

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Solution for 0.25X^2+6X=31 equation:


Simplifying
0.25X2 + 6X = 31

Reorder the terms:
6X + 0.25X2 = 31

Solving
6X + 0.25X2 = 31

Solving for variable 'X'.

Reorder the terms:
-31 + 6X + 0.25X2 = 31 + -31

Combine like terms: 31 + -31 = 0
-31 + 6X + 0.25X2 = 0

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

Divide each side by '0.25'.
-124 + 24X + X2 = 0

Move the constant term to the right:

Add '124' to each side of the equation.
-124 + 24X + 124 + X2 = 0 + 124

Reorder the terms:
-124 + 124 + 24X + X2 = 0 + 124

Combine like terms: -124 + 124 = 0
0 + 24X + X2 = 0 + 124
24X + X2 = 0 + 124

Combine like terms: 0 + 124 = 124
24X + X2 = 124

The X term is 24X.  Take half its coefficient (12).
Square it (144) and add it to both sides.

Add '144' to each side of the equation.
24X + 144 + X2 = 124 + 144

Reorder the terms:
144 + 24X + X2 = 124 + 144

Combine like terms: 124 + 144 = 268
144 + 24X + X2 = 268

Factor a perfect square on the left side:
(X + 12)(X + 12) = 268

Calculate the square root of the right side: 16.370705544

Break this problem into two subproblems by setting 
(X + 12) equal to 16.370705544 and -16.370705544.

Subproblem 1

X + 12 = 16.370705544 Simplifying X + 12 = 16.370705544 Reorder the terms: 12 + X = 16.370705544 Solving 12 + X = 16.370705544 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '-12' to each side of the equation. 12 + -12 + X = 16.370705544 + -12 Combine like terms: 12 + -12 = 0 0 + X = 16.370705544 + -12 X = 16.370705544 + -12 Combine like terms: 16.370705544 + -12 = 4.370705544 X = 4.370705544 Simplifying X = 4.370705544

Subproblem 2

X + 12 = -16.370705544 Simplifying X + 12 = -16.370705544 Reorder the terms: 12 + X = -16.370705544 Solving 12 + X = -16.370705544 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '-12' to each side of the equation. 12 + -12 + X = -16.370705544 + -12 Combine like terms: 12 + -12 = 0 0 + X = -16.370705544 + -12 X = -16.370705544 + -12 Combine like terms: -16.370705544 + -12 = -28.370705544 X = -28.370705544 Simplifying X = -28.370705544

Solution

The solution to the problem is based on the solutions from the subproblems. X = {4.370705544, -28.370705544}

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