2X^2-13X-64=0

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Solution for 2X^2-13X-64=0 equation:


Simplifying
2X2 + -13X + -64 = 0

Reorder the terms:
-64 + -13X + 2X2 = 0

Solving
-64 + -13X + 2X2 = 0

Solving for variable 'X'.

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

Divide each side by '2'.
-32 + -6.5X + X2 = 0

Move the constant term to the right:

Add '32' to each side of the equation.
-32 + -6.5X + 32 + X2 = 0 + 32

Reorder the terms:
-32 + 32 + -6.5X + X2 = 0 + 32

Combine like terms: -32 + 32 = 0
0 + -6.5X + X2 = 0 + 32
-6.5X + X2 = 0 + 32

Combine like terms: 0 + 32 = 32
-6.5X + X2 = 32

The X term is -6.5X.  Take half its coefficient (-3.25).
Square it (10.5625) and add it to both sides.

Add '10.5625' to each side of the equation.
-6.5X + 10.5625 + X2 = 32 + 10.5625

Reorder the terms:
10.5625 + -6.5X + X2 = 32 + 10.5625

Combine like terms: 32 + 10.5625 = 42.5625
10.5625 + -6.5X + X2 = 42.5625

Factor a perfect square on the left side:
(X + -3.25)(X + -3.25) = 42.5625

Calculate the square root of the right side: 6.523994175

Break this problem into two subproblems by setting 
(X + -3.25) equal to 6.523994175 and -6.523994175.

Subproblem 1

X + -3.25 = 6.523994175 Simplifying X + -3.25 = 6.523994175 Reorder the terms: -3.25 + X = 6.523994175 Solving -3.25 + X = 6.523994175 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '3.25' to each side of the equation. -3.25 + 3.25 + X = 6.523994175 + 3.25 Combine like terms: -3.25 + 3.25 = 0.00 0.00 + X = 6.523994175 + 3.25 X = 6.523994175 + 3.25 Combine like terms: 6.523994175 + 3.25 = 9.773994175 X = 9.773994175 Simplifying X = 9.773994175

Subproblem 2

X + -3.25 = -6.523994175 Simplifying X + -3.25 = -6.523994175 Reorder the terms: -3.25 + X = -6.523994175 Solving -3.25 + X = -6.523994175 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '3.25' to each side of the equation. -3.25 + 3.25 + X = -6.523994175 + 3.25 Combine like terms: -3.25 + 3.25 = 0.00 0.00 + X = -6.523994175 + 3.25 X = -6.523994175 + 3.25 Combine like terms: -6.523994175 + 3.25 = -3.273994175 X = -3.273994175 Simplifying X = -3.273994175

Solution

The solution to the problem is based on the solutions from the subproblems. X = {9.773994175, -3.273994175}

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