5x^2-63x+72=0

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Solution for 5x^2-63x+72=0 equation:


Simplifying
5x2 + -63x + 72 = 0

Reorder the terms:
72 + -63x + 5x2 = 0

Solving
72 + -63x + 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'.
14.4 + -12.6x + x2 = 0

Move the constant term to the right:

Add '-14.4' to each side of the equation.
14.4 + -12.6x + -14.4 + x2 = 0 + -14.4

Reorder the terms:
14.4 + -14.4 + -12.6x + x2 = 0 + -14.4

Combine like terms: 14.4 + -14.4 = 0.0
0.0 + -12.6x + x2 = 0 + -14.4
-12.6x + x2 = 0 + -14.4

Combine like terms: 0 + -14.4 = -14.4
-12.6x + x2 = -14.4

The x term is -12.6x.  Take half its coefficient (-6.3).
Square it (39.69) and add it to both sides.

Add '39.69' to each side of the equation.
-12.6x + 39.69 + x2 = -14.4 + 39.69

Reorder the terms:
39.69 + -12.6x + x2 = -14.4 + 39.69

Combine like terms: -14.4 + 39.69 = 25.29
39.69 + -12.6x + x2 = 25.29

Factor a perfect square on the left side:
(x + -6.3)(x + -6.3) = 25.29

Calculate the square root of the right side: 5.028916384

Break this problem into two subproblems by setting 
(x + -6.3) equal to 5.028916384 and -5.028916384.

Subproblem 1

x + -6.3 = 5.028916384 Simplifying x + -6.3 = 5.028916384 Reorder the terms: -6.3 + x = 5.028916384 Solving -6.3 + x = 5.028916384 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6.3' to each side of the equation. -6.3 + 6.3 + x = 5.028916384 + 6.3 Combine like terms: -6.3 + 6.3 = 0.0 0.0 + x = 5.028916384 + 6.3 x = 5.028916384 + 6.3 Combine like terms: 5.028916384 + 6.3 = 11.328916384 x = 11.328916384 Simplifying x = 11.328916384

Subproblem 2

x + -6.3 = -5.028916384 Simplifying x + -6.3 = -5.028916384 Reorder the terms: -6.3 + x = -5.028916384 Solving -6.3 + x = -5.028916384 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6.3' to each side of the equation. -6.3 + 6.3 + x = -5.028916384 + 6.3 Combine like terms: -6.3 + 6.3 = 0.0 0.0 + x = -5.028916384 + 6.3 x = -5.028916384 + 6.3 Combine like terms: -5.028916384 + 6.3 = 1.271083616 x = 1.271083616 Simplifying x = 1.271083616

Solution

The solution to the problem is based on the solutions from the subproblems. x = {11.328916384, 1.271083616}

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