(x-7)+9-(x-8)(x+6)+57=1.09

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Solution for (x-7)+9-(x-8)(x+6)+57=1.09 equation:


Simplifying
(x + -7) + 9 + -1(x + -8)(x + 6) + 57 = 1.09

Reorder the terms:
(-7 + x) + 9 + -1(x + -8)(x + 6) + 57 = 1.09

Remove parenthesis around (-7 + x)
-7 + x + 9 + -1(x + -8)(x + 6) + 57 = 1.09

Reorder the terms:
-7 + x + 9 + -1(-8 + x)(x + 6) + 57 = 1.09

Reorder the terms:
-7 + x + 9 + -1(-8 + x)(6 + x) + 57 = 1.09

Multiply (-8 + x) * (6 + x)
-7 + x + 9 + -1(-8(6 + x) + x(6 + x)) + 57 = 1.09
-7 + x + 9 + -1((6 * -8 + x * -8) + x(6 + x)) + 57 = 1.09
-7 + x + 9 + -1((-48 + -8x) + x(6 + x)) + 57 = 1.09
-7 + x + 9 + -1(-48 + -8x + (6 * x + x * x)) + 57 = 1.09
-7 + x + 9 + -1(-48 + -8x + (6x + x2)) + 57 = 1.09

Combine like terms: -8x + 6x = -2x
-7 + x + 9 + -1(-48 + -2x + x2) + 57 = 1.09
-7 + x + 9 + (-48 * -1 + -2x * -1 + x2 * -1) + 57 = 1.09
-7 + x + 9 + (48 + 2x + -1x2) + 57 = 1.09

Reorder the terms:
-7 + 9 + 48 + 57 + x + 2x + -1x2 = 1.09

Combine like terms: -7 + 9 = 2
2 + 48 + 57 + x + 2x + -1x2 = 1.09

Combine like terms: 2 + 48 = 50
50 + 57 + x + 2x + -1x2 = 1.09

Combine like terms: 50 + 57 = 107
107 + x + 2x + -1x2 = 1.09

Combine like terms: x + 2x = 3x
107 + 3x + -1x2 = 1.09

Solving
107 + 3x + -1x2 = 1.09

Solving for variable 'x'.

Reorder the terms:
107 + -1.09 + 3x + -1x2 = 1.09 + -1.09

Combine like terms: 107 + -1.09 = 105.91
105.91 + 3x + -1x2 = 1.09 + -1.09

Combine like terms: 1.09 + -1.09 = 0.00
105.91 + 3x + -1x2 = 0.00

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-105.91 + -3x + x2 = 0.00

Move the constant term to the right:

Add '105.91' to each side of the equation.
-105.91 + -3x + 105.91 + x2 = 0.00 + 105.91

Reorder the terms:
-105.91 + 105.91 + -3x + x2 = 0.00 + 105.91

Combine like terms: -105.91 + 105.91 = 0.00
0.00 + -3x + x2 = 0.00 + 105.91
-3x + x2 = 0.00 + 105.91

Combine like terms: 0.00 + 105.91 = 105.91
-3x + x2 = 105.91

The x term is -3x.  Take half its coefficient (-1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
-3x + 2.25 + x2 = 105.91 + 2.25

Reorder the terms:
2.25 + -3x + x2 = 105.91 + 2.25

Combine like terms: 105.91 + 2.25 = 108.16
2.25 + -3x + x2 = 108.16

Factor a perfect square on the left side:
(x + -1.5)(x + -1.5) = 108.16

Calculate the square root of the right side: 10.4

Break this problem into two subproblems by setting 
(x + -1.5) equal to 10.4 and -10.4.

Subproblem 1

x + -1.5 = 10.4 Simplifying x + -1.5 = 10.4 Reorder the terms: -1.5 + x = 10.4 Solving -1.5 + x = 10.4 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + x = 10.4 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + x = 10.4 + 1.5 x = 10.4 + 1.5 Combine like terms: 10.4 + 1.5 = 11.9 x = 11.9 Simplifying x = 11.9

Subproblem 2

x + -1.5 = -10.4 Simplifying x + -1.5 = -10.4 Reorder the terms: -1.5 + x = -10.4 Solving -1.5 + x = -10.4 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + x = -10.4 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + x = -10.4 + 1.5 x = -10.4 + 1.5 Combine like terms: -10.4 + 1.5 = -8.9 x = -8.9 Simplifying x = -8.9

Solution

The solution to the problem is based on the solutions from the subproblems. x = {11.9, -8.9}

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