x^2+9x-1608=0

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Solution for x^2+9x-1608=0 equation:


Simplifying
x2 + 9x + -1608 = 0

Reorder the terms:
-1608 + 9x + x2 = 0

Solving
-1608 + 9x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '1608' to each side of the equation.
-1608 + 9x + 1608 + x2 = 0 + 1608

Reorder the terms:
-1608 + 1608 + 9x + x2 = 0 + 1608

Combine like terms: -1608 + 1608 = 0
0 + 9x + x2 = 0 + 1608
9x + x2 = 0 + 1608

Combine like terms: 0 + 1608 = 1608
9x + x2 = 1608

The x term is 9x.  Take half its coefficient (4.5).
Square it (20.25) and add it to both sides.

Add '20.25' to each side of the equation.
9x + 20.25 + x2 = 1608 + 20.25

Reorder the terms:
20.25 + 9x + x2 = 1608 + 20.25

Combine like terms: 1608 + 20.25 = 1628.25
20.25 + 9x + x2 = 1628.25

Factor a perfect square on the left side:
(x + 4.5)(x + 4.5) = 1628.25

Calculate the square root of the right side: 40.351579895

Break this problem into two subproblems by setting 
(x + 4.5) equal to 40.351579895 and -40.351579895.

Subproblem 1

x + 4.5 = 40.351579895 Simplifying x + 4.5 = 40.351579895 Reorder the terms: 4.5 + x = 40.351579895 Solving 4.5 + x = 40.351579895 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4.5' to each side of the equation. 4.5 + -4.5 + x = 40.351579895 + -4.5 Combine like terms: 4.5 + -4.5 = 0.0 0.0 + x = 40.351579895 + -4.5 x = 40.351579895 + -4.5 Combine like terms: 40.351579895 + -4.5 = 35.851579895 x = 35.851579895 Simplifying x = 35.851579895

Subproblem 2

x + 4.5 = -40.351579895 Simplifying x + 4.5 = -40.351579895 Reorder the terms: 4.5 + x = -40.351579895 Solving 4.5 + x = -40.351579895 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4.5' to each side of the equation. 4.5 + -4.5 + x = -40.351579895 + -4.5 Combine like terms: 4.5 + -4.5 = 0.0 0.0 + x = -40.351579895 + -4.5 x = -40.351579895 + -4.5 Combine like terms: -40.351579895 + -4.5 = -44.851579895 x = -44.851579895 Simplifying x = -44.851579895

Solution

The solution to the problem is based on the solutions from the subproblems. x = {35.851579895, -44.851579895}

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