5x^2+53x-72=0

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Solution for 5x^2+53x-72=0 equation:


Simplifying
5x2 + 53x + -72 = 0

Reorder the terms:
-72 + 53x + 5x2 = 0

Solving
-72 + 53x + 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 + 10.6x + x2 = 0

Move the constant term to the right:

Add '14.4' to each side of the equation.
-14.4 + 10.6x + 14.4 + x2 = 0 + 14.4

Reorder the terms:
-14.4 + 14.4 + 10.6x + x2 = 0 + 14.4

Combine like terms: -14.4 + 14.4 = 0.0
0.0 + 10.6x + x2 = 0 + 14.4
10.6x + x2 = 0 + 14.4

Combine like terms: 0 + 14.4 = 14.4
10.6x + x2 = 14.4

The x term is 10.6x.  Take half its coefficient (5.3).
Square it (28.09) and add it to both sides.

Add '28.09' to each side of the equation.
10.6x + 28.09 + x2 = 14.4 + 28.09

Reorder the terms:
28.09 + 10.6x + x2 = 14.4 + 28.09

Combine like terms: 14.4 + 28.09 = 42.49
28.09 + 10.6x + x2 = 42.49

Factor a perfect square on the left side:
(x + 5.3)(x + 5.3) = 42.49

Calculate the square root of the right side: 6.518435395

Break this problem into two subproblems by setting 
(x + 5.3) equal to 6.518435395 and -6.518435395.

Subproblem 1

x + 5.3 = 6.518435395 Simplifying x + 5.3 = 6.518435395 Reorder the terms: 5.3 + x = 6.518435395 Solving 5.3 + x = 6.518435395 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5.3' to each side of the equation. 5.3 + -5.3 + x = 6.518435395 + -5.3 Combine like terms: 5.3 + -5.3 = 0.0 0.0 + x = 6.518435395 + -5.3 x = 6.518435395 + -5.3 Combine like terms: 6.518435395 + -5.3 = 1.218435395 x = 1.218435395 Simplifying x = 1.218435395

Subproblem 2

x + 5.3 = -6.518435395 Simplifying x + 5.3 = -6.518435395 Reorder the terms: 5.3 + x = -6.518435395 Solving 5.3 + x = -6.518435395 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5.3' to each side of the equation. 5.3 + -5.3 + x = -6.518435395 + -5.3 Combine like terms: 5.3 + -5.3 = 0.0 0.0 + x = -6.518435395 + -5.3 x = -6.518435395 + -5.3 Combine like terms: -6.518435395 + -5.3 = -11.818435395 x = -11.818435395 Simplifying x = -11.818435395

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.218435395, -11.818435395}

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