X=4X^2-24X-36

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Solution for X=4X^2-24X-36 equation:


Simplifying
X = 4X2 + -24X + -36

Reorder the terms:
X = -36 + -24X + 4X2

Solving
X = -36 + -24X + 4X2

Solving for variable 'X'.

Reorder the terms:
36 + X + 24X + -4X2 = -36 + -24X + 4X2 + 36 + 24X + -4X2

Combine like terms: X + 24X = 25X
36 + 25X + -4X2 = -36 + -24X + 4X2 + 36 + 24X + -4X2

Reorder the terms:
36 + 25X + -4X2 = -36 + 36 + -24X + 24X + 4X2 + -4X2

Combine like terms: -36 + 36 = 0
36 + 25X + -4X2 = 0 + -24X + 24X + 4X2 + -4X2
36 + 25X + -4X2 = -24X + 24X + 4X2 + -4X2

Combine like terms: -24X + 24X = 0
36 + 25X + -4X2 = 0 + 4X2 + -4X2
36 + 25X + -4X2 = 4X2 + -4X2

Combine like terms: 4X2 + -4X2 = 0
36 + 25X + -4X2 = 0

Begin completing the square.  Divide all terms by
-4 the coefficient of the squared term: 

Divide each side by '-4'.
-9 + -6.25X + X2 = 0

Move the constant term to the right:

Add '9' to each side of the equation.
-9 + -6.25X + 9 + X2 = 0 + 9

Reorder the terms:
-9 + 9 + -6.25X + X2 = 0 + 9

Combine like terms: -9 + 9 = 0
0 + -6.25X + X2 = 0 + 9
-6.25X + X2 = 0 + 9

Combine like terms: 0 + 9 = 9
-6.25X + X2 = 9

The X term is -6.25X.  Take half its coefficient (-3.125).
Square it (9.765625) and add it to both sides.

Add '9.765625' to each side of the equation.
-6.25X + 9.765625 + X2 = 9 + 9.765625

Reorder the terms:
9.765625 + -6.25X + X2 = 9 + 9.765625

Combine like terms: 9 + 9.765625 = 18.765625
9.765625 + -6.25X + X2 = 18.765625

Factor a perfect square on the left side:
(X + -3.125)(X + -3.125) = 18.765625

Calculate the square root of the right side: 4.331930863

Break this problem into two subproblems by setting 
(X + -3.125) equal to 4.331930863 and -4.331930863.

Subproblem 1

X + -3.125 = 4.331930863 Simplifying X + -3.125 = 4.331930863 Reorder the terms: -3.125 + X = 4.331930863 Solving -3.125 + X = 4.331930863 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '3.125' to each side of the equation. -3.125 + 3.125 + X = 4.331930863 + 3.125 Combine like terms: -3.125 + 3.125 = 0.000 0.000 + X = 4.331930863 + 3.125 X = 4.331930863 + 3.125 Combine like terms: 4.331930863 + 3.125 = 7.456930863 X = 7.456930863 Simplifying X = 7.456930863

Subproblem 2

X + -3.125 = -4.331930863 Simplifying X + -3.125 = -4.331930863 Reorder the terms: -3.125 + X = -4.331930863 Solving -3.125 + X = -4.331930863 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '3.125' to each side of the equation. -3.125 + 3.125 + X = -4.331930863 + 3.125 Combine like terms: -3.125 + 3.125 = 0.000 0.000 + X = -4.331930863 + 3.125 X = -4.331930863 + 3.125 Combine like terms: -4.331930863 + 3.125 = -1.206930863 X = -1.206930863 Simplifying X = -1.206930863

Solution

The solution to the problem is based on the solutions from the subproblems. X = {7.456930863, -1.206930863}

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