5x^2-54x-63=0

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Solution for 5x^2-54x-63=0 equation:


Simplifying
5x2 + -54x + -63 = 0

Reorder the terms:
-63 + -54x + 5x2 = 0

Solving
-63 + -54x + 5x2 = 0

Solving for variable 'x'.

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

Divide each side by '5'.
-12.6 + -10.8x + x2 = 0

Move the constant term to the right:

Add '12.6' to each side of the equation.
-12.6 + -10.8x + 12.6 + x2 = 0 + 12.6

Reorder the terms:
-12.6 + 12.6 + -10.8x + x2 = 0 + 12.6

Combine like terms: -12.6 + 12.6 = 0.0
0.0 + -10.8x + x2 = 0 + 12.6
-10.8x + x2 = 0 + 12.6

Combine like terms: 0 + 12.6 = 12.6
-10.8x + x2 = 12.6

The x term is -10.8x.  Take half its coefficient (-5.4).
Square it (29.16) and add it to both sides.

Add '29.16' to each side of the equation.
-10.8x + 29.16 + x2 = 12.6 + 29.16

Reorder the terms:
29.16 + -10.8x + x2 = 12.6 + 29.16

Combine like terms: 12.6 + 29.16 = 41.76
29.16 + -10.8x + x2 = 41.76

Factor a perfect square on the left side:
(x + -5.4)(x + -5.4) = 41.76

Calculate the square root of the right side: 6.462197769

Break this problem into two subproblems by setting 
(x + -5.4) equal to 6.462197769 and -6.462197769.

Subproblem 1

x + -5.4 = 6.462197769 Simplifying x + -5.4 = 6.462197769 Reorder the terms: -5.4 + x = 6.462197769 Solving -5.4 + x = 6.462197769 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5.4' to each side of the equation. -5.4 + 5.4 + x = 6.462197769 + 5.4 Combine like terms: -5.4 + 5.4 = 0.0 0.0 + x = 6.462197769 + 5.4 x = 6.462197769 + 5.4 Combine like terms: 6.462197769 + 5.4 = 11.862197769 x = 11.862197769 Simplifying x = 11.862197769

Subproblem 2

x + -5.4 = -6.462197769 Simplifying x + -5.4 = -6.462197769 Reorder the terms: -5.4 + x = -6.462197769 Solving -5.4 + x = -6.462197769 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5.4' to each side of the equation. -5.4 + 5.4 + x = -6.462197769 + 5.4 Combine like terms: -5.4 + 5.4 = 0.0 0.0 + x = -6.462197769 + 5.4 x = -6.462197769 + 5.4 Combine like terms: -6.462197769 + 5.4 = -1.062197769 x = -1.062197769 Simplifying x = -1.062197769

Solution

The solution to the problem is based on the solutions from the subproblems. x = {11.862197769, -1.062197769}

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