-x^2+12x-30=0

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Solution for -x^2+12x-30=0 equation:


Simplifying
-1x2 + 12x + -30 = 0

Reorder the terms:
-30 + 12x + -1x2 = 0

Solving
-30 + 12x + -1x2 = 0

Solving for variable 'x'.

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

Divide each side by '-1'.
30 + -12x + x2 = 0

Move the constant term to the right:

Add '-30' to each side of the equation.
30 + -12x + -30 + x2 = 0 + -30

Reorder the terms:
30 + -30 + -12x + x2 = 0 + -30

Combine like terms: 30 + -30 = 0
0 + -12x + x2 = 0 + -30
-12x + x2 = 0 + -30

Combine like terms: 0 + -30 = -30
-12x + x2 = -30

The x term is -12x.  Take half its coefficient (-6).
Square it (36) and add it to both sides.

Add '36' to each side of the equation.
-12x + 36 + x2 = -30 + 36

Reorder the terms:
36 + -12x + x2 = -30 + 36

Combine like terms: -30 + 36 = 6
36 + -12x + x2 = 6

Factor a perfect square on the left side:
(x + -6)(x + -6) = 6

Calculate the square root of the right side: 2.449489743

Break this problem into two subproblems by setting 
(x + -6) equal to 2.449489743 and -2.449489743.

Subproblem 1

x + -6 = 2.449489743 Simplifying x + -6 = 2.449489743 Reorder the terms: -6 + x = 2.449489743 Solving -6 + x = 2.449489743 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6' to each side of the equation. -6 + 6 + x = 2.449489743 + 6 Combine like terms: -6 + 6 = 0 0 + x = 2.449489743 + 6 x = 2.449489743 + 6 Combine like terms: 2.449489743 + 6 = 8.449489743 x = 8.449489743 Simplifying x = 8.449489743

Subproblem 2

x + -6 = -2.449489743 Simplifying x + -6 = -2.449489743 Reorder the terms: -6 + x = -2.449489743 Solving -6 + x = -2.449489743 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6' to each side of the equation. -6 + 6 + x = -2.449489743 + 6 Combine like terms: -6 + 6 = 0 0 + x = -2.449489743 + 6 x = -2.449489743 + 6 Combine like terms: -2.449489743 + 6 = 3.550510257 x = 3.550510257 Simplifying x = 3.550510257

Solution

The solution to the problem is based on the solutions from the subproblems. x = {8.449489743, 3.550510257}

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