36x^2-324x-679=0

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Solution for 36x^2-324x-679=0 equation:


Simplifying
36x2 + -324x + -679 = 0

Reorder the terms:
-679 + -324x + 36x2 = 0

Solving
-679 + -324x + 36x2 = 0

Solving for variable 'x'.

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

Divide each side by '36'.
-18.86111111 + -9x + x2 = 0

Move the constant term to the right:

Add '18.86111111' to each side of the equation.
-18.86111111 + -9x + 18.86111111 + x2 = 0 + 18.86111111

Reorder the terms:
-18.86111111 + 18.86111111 + -9x + x2 = 0 + 18.86111111

Combine like terms: -18.86111111 + 18.86111111 = 0.00000000
0.00000000 + -9x + x2 = 0 + 18.86111111
-9x + x2 = 0 + 18.86111111

Combine like terms: 0 + 18.86111111 = 18.86111111
-9x + x2 = 18.86111111

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 = 18.86111111 + 20.25

Reorder the terms:
20.25 + -9x + x2 = 18.86111111 + 20.25

Combine like terms: 18.86111111 + 20.25 = 39.11111111
20.25 + -9x + x2 = 39.11111111

Factor a perfect square on the left side:
(x + -4.5)(x + -4.5) = 39.11111111

Calculate the square root of the right side: 6.25388768

Break this problem into two subproblems by setting 
(x + -4.5) equal to 6.25388768 and -6.25388768.

Subproblem 1

x + -4.5 = 6.25388768 Simplifying x + -4.5 = 6.25388768 Reorder the terms: -4.5 + x = 6.25388768 Solving -4.5 + x = 6.25388768 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 = 6.25388768 + 4.5 Combine like terms: -4.5 + 4.5 = 0.0 0.0 + x = 6.25388768 + 4.5 x = 6.25388768 + 4.5 Combine like terms: 6.25388768 + 4.5 = 10.75388768 x = 10.75388768 Simplifying x = 10.75388768

Subproblem 2

x + -4.5 = -6.25388768 Simplifying x + -4.5 = -6.25388768 Reorder the terms: -4.5 + x = -6.25388768 Solving -4.5 + x = -6.25388768 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 = -6.25388768 + 4.5 Combine like terms: -4.5 + 4.5 = 0.0 0.0 + x = -6.25388768 + 4.5 x = -6.25388768 + 4.5 Combine like terms: -6.25388768 + 4.5 = -1.75388768 x = -1.75388768 Simplifying x = -1.75388768

Solution

The solution to the problem is based on the solutions from the subproblems. x = {10.75388768, -1.75388768}

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