(8x^2-7x+27)+(7x^2+9x-58)=

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Solution for (8x^2-7x+27)+(7x^2+9x-58)= equation:


Simplifying
(8x2 + -7x + 27) + (7x2 + 9x + -58) = 0

Reorder the terms:
(27 + -7x + 8x2) + (7x2 + 9x + -58) = 0

Remove parenthesis around (27 + -7x + 8x2)
27 + -7x + 8x2 + (7x2 + 9x + -58) = 0

Reorder the terms:
27 + -7x + 8x2 + (-58 + 9x + 7x2) = 0

Remove parenthesis around (-58 + 9x + 7x2)
27 + -7x + 8x2 + -58 + 9x + 7x2 = 0

Reorder the terms:
27 + -58 + -7x + 9x + 8x2 + 7x2 = 0

Combine like terms: 27 + -58 = -31
-31 + -7x + 9x + 8x2 + 7x2 = 0

Combine like terms: -7x + 9x = 2x
-31 + 2x + 8x2 + 7x2 = 0

Combine like terms: 8x2 + 7x2 = 15x2
-31 + 2x + 15x2 = 0

Solving
-31 + 2x + 15x2 = 0

Solving for variable 'x'.

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

Divide each side by '15'.
-2.066666667 + 0.1333333333x + x2 = 0

Move the constant term to the right:

Add '2.066666667' to each side of the equation.
-2.066666667 + 0.1333333333x + 2.066666667 + x2 = 0 + 2.066666667

Reorder the terms:
-2.066666667 + 2.066666667 + 0.1333333333x + x2 = 0 + 2.066666667

Combine like terms: -2.066666667 + 2.066666667 = 0.000000000
0.000000000 + 0.1333333333x + x2 = 0 + 2.066666667
0.1333333333x + x2 = 0 + 2.066666667

Combine like terms: 0 + 2.066666667 = 2.066666667
0.1333333333x + x2 = 2.066666667

The x term is 0.1333333333x.  Take half its coefficient (0.06666666665).
Square it (0.004444444442) and add it to both sides.

Add '0.004444444442' to each side of the equation.
0.1333333333x + 0.004444444442 + x2 = 2.066666667 + 0.004444444442

Reorder the terms:
0.004444444442 + 0.1333333333x + x2 = 2.066666667 + 0.004444444442

Combine like terms: 2.066666667 + 0.004444444442 = 2.071111111442
0.004444444442 + 0.1333333333x + x2 = 2.071111111442

Factor a perfect square on the left side:
(x + 0.06666666665)(x + 0.06666666665) = 2.071111111442

Calculate the square root of the right side: 1.439135543

Break this problem into two subproblems by setting 
(x + 0.06666666665) equal to 1.439135543 and -1.439135543.

Subproblem 1

x + 0.06666666665 = 1.439135543 Simplifying x + 0.06666666665 = 1.439135543 Reorder the terms: 0.06666666665 + x = 1.439135543 Solving 0.06666666665 + x = 1.439135543 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.06666666665' to each side of the equation. 0.06666666665 + -0.06666666665 + x = 1.439135543 + -0.06666666665 Combine like terms: 0.06666666665 + -0.06666666665 = 0.00000000000 0.00000000000 + x = 1.439135543 + -0.06666666665 x = 1.439135543 + -0.06666666665 Combine like terms: 1.439135543 + -0.06666666665 = 1.37246887635 x = 1.37246887635 Simplifying x = 1.37246887635

Subproblem 2

x + 0.06666666665 = -1.439135543 Simplifying x + 0.06666666665 = -1.439135543 Reorder the terms: 0.06666666665 + x = -1.439135543 Solving 0.06666666665 + x = -1.439135543 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.06666666665' to each side of the equation. 0.06666666665 + -0.06666666665 + x = -1.439135543 + -0.06666666665 Combine like terms: 0.06666666665 + -0.06666666665 = 0.00000000000 0.00000000000 + x = -1.439135543 + -0.06666666665 x = -1.439135543 + -0.06666666665 Combine like terms: -1.439135543 + -0.06666666665 = -1.50580220965 x = -1.50580220965 Simplifying x = -1.50580220965

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.37246887635, -1.50580220965}

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