(7x^2-6x+29)+(2x^2+9x-72)=

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Solution for (7x^2-6x+29)+(2x^2+9x-72)= equation:


Simplifying
(7x2 + -6x + 29) + (2x2 + 9x + -72) = 0

Reorder the terms:
(29 + -6x + 7x2) + (2x2 + 9x + -72) = 0

Remove parenthesis around (29 + -6x + 7x2)
29 + -6x + 7x2 + (2x2 + 9x + -72) = 0

Reorder the terms:
29 + -6x + 7x2 + (-72 + 9x + 2x2) = 0

Remove parenthesis around (-72 + 9x + 2x2)
29 + -6x + 7x2 + -72 + 9x + 2x2 = 0

Reorder the terms:
29 + -72 + -6x + 9x + 7x2 + 2x2 = 0

Combine like terms: 29 + -72 = -43
-43 + -6x + 9x + 7x2 + 2x2 = 0

Combine like terms: -6x + 9x = 3x
-43 + 3x + 7x2 + 2x2 = 0

Combine like terms: 7x2 + 2x2 = 9x2
-43 + 3x + 9x2 = 0

Solving
-43 + 3x + 9x2 = 0

Solving for variable 'x'.

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

Divide each side by '9'.
-4.777777778 + 0.3333333333x + x2 = 0

Move the constant term to the right:

Add '4.777777778' to each side of the equation.
-4.777777778 + 0.3333333333x + 4.777777778 + x2 = 0 + 4.777777778

Reorder the terms:
-4.777777778 + 4.777777778 + 0.3333333333x + x2 = 0 + 4.777777778

Combine like terms: -4.777777778 + 4.777777778 = 0.000000000
0.000000000 + 0.3333333333x + x2 = 0 + 4.777777778
0.3333333333x + x2 = 0 + 4.777777778

Combine like terms: 0 + 4.777777778 = 4.777777778
0.3333333333x + x2 = 4.777777778

The x term is 0.3333333333x.  Take half its coefficient (0.1666666667).
Square it (0.02777777779) and add it to both sides.

Add '0.02777777779' to each side of the equation.
0.3333333333x + 0.02777777779 + x2 = 4.777777778 + 0.02777777779

Reorder the terms:
0.02777777779 + 0.3333333333x + x2 = 4.777777778 + 0.02777777779

Combine like terms: 4.777777778 + 0.02777777779 = 4.80555555579
0.02777777779 + 0.3333333333x + x2 = 4.80555555579

Factor a perfect square on the left side:
(x + 0.1666666667)(x + 0.1666666667) = 4.80555555579

Calculate the square root of the right side: 2.19215774

Break this problem into two subproblems by setting 
(x + 0.1666666667) equal to 2.19215774 and -2.19215774.

Subproblem 1

x + 0.1666666667 = 2.19215774 Simplifying x + 0.1666666667 = 2.19215774 Reorder the terms: 0.1666666667 + x = 2.19215774 Solving 0.1666666667 + x = 2.19215774 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.1666666667' to each side of the equation. 0.1666666667 + -0.1666666667 + x = 2.19215774 + -0.1666666667 Combine like terms: 0.1666666667 + -0.1666666667 = 0.0000000000 0.0000000000 + x = 2.19215774 + -0.1666666667 x = 2.19215774 + -0.1666666667 Combine like terms: 2.19215774 + -0.1666666667 = 2.0254910733 x = 2.0254910733 Simplifying x = 2.0254910733

Subproblem 2

x + 0.1666666667 = -2.19215774 Simplifying x + 0.1666666667 = -2.19215774 Reorder the terms: 0.1666666667 + x = -2.19215774 Solving 0.1666666667 + x = -2.19215774 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.1666666667' to each side of the equation. 0.1666666667 + -0.1666666667 + x = -2.19215774 + -0.1666666667 Combine like terms: 0.1666666667 + -0.1666666667 = 0.0000000000 0.0000000000 + x = -2.19215774 + -0.1666666667 x = -2.19215774 + -0.1666666667 Combine like terms: -2.19215774 + -0.1666666667 = -2.3588244067 x = -2.3588244067 Simplifying x = -2.3588244067

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.0254910733, -2.3588244067}

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