x(6-x)+1=-9

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Solution for x(6-x)+1=-9 equation:


Simplifying
x(6 + -1x) + 1 = -9
(6 * x + -1x * x) + 1 = -9
(6x + -1x2) + 1 = -9

Reorder the terms:
1 + 6x + -1x2 = -9

Solving
1 + 6x + -1x2 = -9

Solving for variable 'x'.

Reorder the terms:
1 + 9 + 6x + -1x2 = -9 + 9

Combine like terms: 1 + 9 = 10
10 + 6x + -1x2 = -9 + 9

Combine like terms: -9 + 9 = 0
10 + 6x + -1x2 = 0

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

Divide each side by '-1'.
-10 + -6x + x2 = 0

Move the constant term to the right:

Add '10' to each side of the equation.
-10 + -6x + 10 + x2 = 0 + 10

Reorder the terms:
-10 + 10 + -6x + x2 = 0 + 10

Combine like terms: -10 + 10 = 0
0 + -6x + x2 = 0 + 10
-6x + x2 = 0 + 10

Combine like terms: 0 + 10 = 10
-6x + x2 = 10

The x term is -6x.  Take half its coefficient (-3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
-6x + 9 + x2 = 10 + 9

Reorder the terms:
9 + -6x + x2 = 10 + 9

Combine like terms: 10 + 9 = 19
9 + -6x + x2 = 19

Factor a perfect square on the left side:
(x + -3)(x + -3) = 19

Calculate the square root of the right side: 4.358898944

Break this problem into two subproblems by setting 
(x + -3) equal to 4.358898944 and -4.358898944.

Subproblem 1

x + -3 = 4.358898944 Simplifying x + -3 = 4.358898944 Reorder the terms: -3 + x = 4.358898944 Solving -3 + x = 4.358898944 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + x = 4.358898944 + 3 Combine like terms: -3 + 3 = 0 0 + x = 4.358898944 + 3 x = 4.358898944 + 3 Combine like terms: 4.358898944 + 3 = 7.358898944 x = 7.358898944 Simplifying x = 7.358898944

Subproblem 2

x + -3 = -4.358898944 Simplifying x + -3 = -4.358898944 Reorder the terms: -3 + x = -4.358898944 Solving -3 + x = -4.358898944 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + x = -4.358898944 + 3 Combine like terms: -3 + 3 = 0 0 + x = -4.358898944 + 3 x = -4.358898944 + 3 Combine like terms: -4.358898944 + 3 = -1.358898944 x = -1.358898944 Simplifying x = -1.358898944

Solution

The solution to the problem is based on the solutions from the subproblems. x = {7.358898944, -1.358898944}

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