2x^2+9x-64=

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Solution for 2x^2+9x-64= equation:


Simplifying
2x2 + 9x + -64 = 0

Reorder the terms:
-64 + 9x + 2x2 = 0

Solving
-64 + 9x + 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 + 4.5x + x2 = 0

Move the constant term to the right:

Add '32' to each side of the equation.
-32 + 4.5x + 32 + x2 = 0 + 32

Reorder the terms:
-32 + 32 + 4.5x + x2 = 0 + 32

Combine like terms: -32 + 32 = 0
0 + 4.5x + x2 = 0 + 32
4.5x + x2 = 0 + 32

Combine like terms: 0 + 32 = 32
4.5x + x2 = 32

The x term is 4.5x.  Take half its coefficient (2.25).
Square it (5.0625) and add it to both sides.

Add '5.0625' to each side of the equation.
4.5x + 5.0625 + x2 = 32 + 5.0625

Reorder the terms:
5.0625 + 4.5x + x2 = 32 + 5.0625

Combine like terms: 32 + 5.0625 = 37.0625
5.0625 + 4.5x + x2 = 37.0625

Factor a perfect square on the left side:
(x + 2.25)(x + 2.25) = 37.0625

Calculate the square root of the right side: 6.087897831

Break this problem into two subproblems by setting 
(x + 2.25) equal to 6.087897831 and -6.087897831.

Subproblem 1

x + 2.25 = 6.087897831 Simplifying x + 2.25 = 6.087897831 Reorder the terms: 2.25 + x = 6.087897831 Solving 2.25 + x = 6.087897831 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.25' to each side of the equation. 2.25 + -2.25 + x = 6.087897831 + -2.25 Combine like terms: 2.25 + -2.25 = 0.00 0.00 + x = 6.087897831 + -2.25 x = 6.087897831 + -2.25 Combine like terms: 6.087897831 + -2.25 = 3.837897831 x = 3.837897831 Simplifying x = 3.837897831

Subproblem 2

x + 2.25 = -6.087897831 Simplifying x + 2.25 = -6.087897831 Reorder the terms: 2.25 + x = -6.087897831 Solving 2.25 + x = -6.087897831 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.25' to each side of the equation. 2.25 + -2.25 + x = -6.087897831 + -2.25 Combine like terms: 2.25 + -2.25 = 0.00 0.00 + x = -6.087897831 + -2.25 x = -6.087897831 + -2.25 Combine like terms: -6.087897831 + -2.25 = -8.337897831 x = -8.337897831 Simplifying x = -8.337897831

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.837897831, -8.337897831}

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