64x^2+27x-64=0

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Solution for 64x^2+27x-64=0 equation:


Simplifying
64x2 + 27x + -64 = 0

Reorder the terms:
-64 + 27x + 64x2 = 0

Solving
-64 + 27x + 64x2 = 0

Solving for variable 'x'.

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

Divide each side by '64'.
-1 + 0.421875x + x2 = 0

Move the constant term to the right:

Add '1' to each side of the equation.
-1 + 0.421875x + 1 + x2 = 0 + 1

Reorder the terms:
-1 + 1 + 0.421875x + x2 = 0 + 1

Combine like terms: -1 + 1 = 0
0 + 0.421875x + x2 = 0 + 1
0.421875x + x2 = 0 + 1

Combine like terms: 0 + 1 = 1
0.421875x + x2 = 1

The x term is 0.421875x.  Take half its coefficient (0.2109375).
Square it (0.04449462891) and add it to both sides.

Add '0.04449462891' to each side of the equation.
0.421875x + 0.04449462891 + x2 = 1 + 0.04449462891

Reorder the terms:
0.04449462891 + 0.421875x + x2 = 1 + 0.04449462891

Combine like terms: 1 + 0.04449462891 = 1.04449462891
0.04449462891 + 0.421875x + x2 = 1.04449462891

Factor a perfect square on the left side:
(x + 0.2109375)(x + 0.2109375) = 1.04449462891

Calculate the square root of the right side: 1.0220052

Break this problem into two subproblems by setting 
(x + 0.2109375) equal to 1.0220052 and -1.0220052.

Subproblem 1

x + 0.2109375 = 1.0220052 Simplifying x + 0.2109375 = 1.0220052 Reorder the terms: 0.2109375 + x = 1.0220052 Solving 0.2109375 + x = 1.0220052 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.2109375' to each side of the equation. 0.2109375 + -0.2109375 + x = 1.0220052 + -0.2109375 Combine like terms: 0.2109375 + -0.2109375 = 0.0000000 0.0000000 + x = 1.0220052 + -0.2109375 x = 1.0220052 + -0.2109375 Combine like terms: 1.0220052 + -0.2109375 = 0.8110677 x = 0.8110677 Simplifying x = 0.8110677

Subproblem 2

x + 0.2109375 = -1.0220052 Simplifying x + 0.2109375 = -1.0220052 Reorder the terms: 0.2109375 + x = -1.0220052 Solving 0.2109375 + x = -1.0220052 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.2109375' to each side of the equation. 0.2109375 + -0.2109375 + x = -1.0220052 + -0.2109375 Combine like terms: 0.2109375 + -0.2109375 = 0.0000000 0.0000000 + x = -1.0220052 + -0.2109375 x = -1.0220052 + -0.2109375 Combine like terms: -1.0220052 + -0.2109375 = -1.2329427 x = -1.2329427 Simplifying x = -1.2329427

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.8110677, -1.2329427}

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