72=1.76x^2-13.32x+41

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Solution for 72=1.76x^2-13.32x+41 equation:


Simplifying
72 = 1.76x2 + -13.32x + 41

Reorder the terms:
72 = 41 + -13.32x + 1.76x2

Solving
72 = 41 + -13.32x + 1.76x2

Solving for variable 'x'.

Combine like terms: 72 + -41 = 31
31 + 13.32x + -1.76x2 = 41 + -13.32x + 1.76x2 + -41 + 13.32x + -1.76x2

Reorder the terms:
31 + 13.32x + -1.76x2 = 41 + -41 + -13.32x + 13.32x + 1.76x2 + -1.76x2

Combine like terms: 41 + -41 = 0
31 + 13.32x + -1.76x2 = 0 + -13.32x + 13.32x + 1.76x2 + -1.76x2
31 + 13.32x + -1.76x2 = -13.32x + 13.32x + 1.76x2 + -1.76x2

Combine like terms: -13.32x + 13.32x = 0.00
31 + 13.32x + -1.76x2 = 0.00 + 1.76x2 + -1.76x2
31 + 13.32x + -1.76x2 = 1.76x2 + -1.76x2

Combine like terms: 1.76x2 + -1.76x2 = 0.00
31 + 13.32x + -1.76x2 = 0.00

Begin completing the square.  Divide all terms by
-1.76 the coefficient of the squared term: 

Divide each side by '-1.76'.
-17.61363636 + -7.568181818x + x2 = 0

Move the constant term to the right:

Add '17.61363636' to each side of the equation.
-17.61363636 + -7.568181818x + 17.61363636 + x2 = 0 + 17.61363636

Reorder the terms:
-17.61363636 + 17.61363636 + -7.568181818x + x2 = 0 + 17.61363636

Combine like terms: -17.61363636 + 17.61363636 = 0.00000000
0.00000000 + -7.568181818x + x2 = 0 + 17.61363636
-7.568181818x + x2 = 0 + 17.61363636

Combine like terms: 0 + 17.61363636 = 17.61363636
-7.568181818x + x2 = 17.61363636

The x term is -7.568181818x.  Take half its coefficient (-3.784090909).
Square it (14.31934401) and add it to both sides.

Add '14.31934401' to each side of the equation.
-7.568181818x + 14.31934401 + x2 = 17.61363636 + 14.31934401

Reorder the terms:
14.31934401 + -7.568181818x + x2 = 17.61363636 + 14.31934401

Combine like terms: 17.61363636 + 14.31934401 = 31.93298037
14.31934401 + -7.568181818x + x2 = 31.93298037

Factor a perfect square on the left side:
(x + -3.784090909)(x + -3.784090909) = 31.93298037

Calculate the square root of the right side: 5.65092739

Break this problem into two subproblems by setting 
(x + -3.784090909) equal to 5.65092739 and -5.65092739.

Subproblem 1

x + -3.784090909 = 5.65092739 Simplifying x + -3.784090909 = 5.65092739 Reorder the terms: -3.784090909 + x = 5.65092739 Solving -3.784090909 + x = 5.65092739 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.784090909' to each side of the equation. -3.784090909 + 3.784090909 + x = 5.65092739 + 3.784090909 Combine like terms: -3.784090909 + 3.784090909 = 0.000000000 0.000000000 + x = 5.65092739 + 3.784090909 x = 5.65092739 + 3.784090909 Combine like terms: 5.65092739 + 3.784090909 = 9.435018299 x = 9.435018299 Simplifying x = 9.435018299

Subproblem 2

x + -3.784090909 = -5.65092739 Simplifying x + -3.784090909 = -5.65092739 Reorder the terms: -3.784090909 + x = -5.65092739 Solving -3.784090909 + x = -5.65092739 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.784090909' to each side of the equation. -3.784090909 + 3.784090909 + x = -5.65092739 + 3.784090909 Combine like terms: -3.784090909 + 3.784090909 = 0.000000000 0.000000000 + x = -5.65092739 + 3.784090909 x = -5.65092739 + 3.784090909 Combine like terms: -5.65092739 + 3.784090909 = -1.866836481 x = -1.866836481 Simplifying x = -1.866836481

Solution

The solution to the problem is based on the solutions from the subproblems. x = {9.435018299, -1.866836481}

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