8(x-2)7x+1=-18

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Solution for 8(x-2)7x+1=-18 equation:


Simplifying
8(x + -2) * 7x + 1 = -18

Reorder the terms:
8(-2 + x) * 7x + 1 = -18

Reorder the terms for easier multiplication:
8 * 7x(-2 + x) + 1 = -18

Multiply 8 * 7
56x(-2 + x) + 1 = -18
(-2 * 56x + x * 56x) + 1 = -18
(-112x + 56x2) + 1 = -18

Reorder the terms:
1 + -112x + 56x2 = -18

Solving
1 + -112x + 56x2 = -18

Solving for variable 'x'.

Reorder the terms:
1 + 18 + -112x + 56x2 = -18 + 18

Combine like terms: 1 + 18 = 19
19 + -112x + 56x2 = -18 + 18

Combine like terms: -18 + 18 = 0
19 + -112x + 56x2 = 0

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

Divide each side by '56'.
0.3392857143 + -2x + x2 = 0

Move the constant term to the right:

Add '-0.3392857143' to each side of the equation.
0.3392857143 + -2x + -0.3392857143 + x2 = 0 + -0.3392857143

Reorder the terms:
0.3392857143 + -0.3392857143 + -2x + x2 = 0 + -0.3392857143

Combine like terms: 0.3392857143 + -0.3392857143 = 0.0000000000
0.0000000000 + -2x + x2 = 0 + -0.3392857143
-2x + x2 = 0 + -0.3392857143

Combine like terms: 0 + -0.3392857143 = -0.3392857143
-2x + x2 = -0.3392857143

The x term is -2x.  Take half its coefficient (-1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
-2x + 1 + x2 = -0.3392857143 + 1

Reorder the terms:
1 + -2x + x2 = -0.3392857143 + 1

Combine like terms: -0.3392857143 + 1 = 0.6607142857
1 + -2x + x2 = 0.6607142857

Factor a perfect square on the left side:
(x + -1)(x + -1) = 0.6607142857

Calculate the square root of the right side: 0.812843334

Break this problem into two subproblems by setting 
(x + -1) equal to 0.812843334 and -0.812843334.

Subproblem 1

x + -1 = 0.812843334 Simplifying x + -1 = 0.812843334 Reorder the terms: -1 + x = 0.812843334 Solving -1 + x = 0.812843334 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = 0.812843334 + 1 Combine like terms: -1 + 1 = 0 0 + x = 0.812843334 + 1 x = 0.812843334 + 1 Combine like terms: 0.812843334 + 1 = 1.812843334 x = 1.812843334 Simplifying x = 1.812843334

Subproblem 2

x + -1 = -0.812843334 Simplifying x + -1 = -0.812843334 Reorder the terms: -1 + x = -0.812843334 Solving -1 + x = -0.812843334 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = -0.812843334 + 1 Combine like terms: -1 + 1 = 0 0 + x = -0.812843334 + 1 x = -0.812843334 + 1 Combine like terms: -0.812843334 + 1 = 0.187156666 x = 0.187156666 Simplifying x = 0.187156666

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.812843334, 0.187156666}

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