x(2x-18)-143=

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Solution for x(2x-18)-143= equation:


Simplifying
x(2x + -18) + -143 = 0

Reorder the terms:
x(-18 + 2x) + -143 = 0
(-18 * x + 2x * x) + -143 = 0
(-18x + 2x2) + -143 = 0

Reorder the terms:
-143 + -18x + 2x2 = 0

Solving
-143 + -18x + 2x2 = 0

Solving for variable 'x'.

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

Divide each side by '2'.
-71.5 + -9x + x2 = 0

Move the constant term to the right:

Add '71.5' to each side of the equation.
-71.5 + -9x + 71.5 + x2 = 0 + 71.5

Reorder the terms:
-71.5 + 71.5 + -9x + x2 = 0 + 71.5

Combine like terms: -71.5 + 71.5 = 0.0
0.0 + -9x + x2 = 0 + 71.5
-9x + x2 = 0 + 71.5

Combine like terms: 0 + 71.5 = 71.5
-9x + x2 = 71.5

The x term is -9x.  Take half its coefficient (-4.5).
Square it (20.25) and add it to both sides.

Add '20.25' to each side of the equation.
-9x + 20.25 + x2 = 71.5 + 20.25

Reorder the terms:
20.25 + -9x + x2 = 71.5 + 20.25

Combine like terms: 71.5 + 20.25 = 91.75
20.25 + -9x + x2 = 91.75

Factor a perfect square on the left side:
(x + -4.5)(x + -4.5) = 91.75

Calculate the square root of the right side: 9.57862203

Break this problem into two subproblems by setting 
(x + -4.5) equal to 9.57862203 and -9.57862203.

Subproblem 1

x + -4.5 = 9.57862203 Simplifying x + -4.5 = 9.57862203 Reorder the terms: -4.5 + x = 9.57862203 Solving -4.5 + x = 9.57862203 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.5' to each side of the equation. -4.5 + 4.5 + x = 9.57862203 + 4.5 Combine like terms: -4.5 + 4.5 = 0.0 0.0 + x = 9.57862203 + 4.5 x = 9.57862203 + 4.5 Combine like terms: 9.57862203 + 4.5 = 14.07862203 x = 14.07862203 Simplifying x = 14.07862203

Subproblem 2

x + -4.5 = -9.57862203 Simplifying x + -4.5 = -9.57862203 Reorder the terms: -4.5 + x = -9.57862203 Solving -4.5 + x = -9.57862203 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.5' to each side of the equation. -4.5 + 4.5 + x = -9.57862203 + 4.5 Combine like terms: -4.5 + 4.5 = 0.0 0.0 + x = -9.57862203 + 4.5 x = -9.57862203 + 4.5 Combine like terms: -9.57862203 + 4.5 = -5.07862203 x = -5.07862203 Simplifying x = -5.07862203

Solution

The solution to the problem is based on the solutions from the subproblems. x = {14.07862203, -5.07862203}

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