x^2-12x-45=-4

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Solution for x^2-12x-45=-4 equation:


Simplifying
x2 + -12x + -45 = -4

Reorder the terms:
-45 + -12x + x2 = -4

Solving
-45 + -12x + x2 = -4

Solving for variable 'x'.

Reorder the terms:
-45 + 4 + -12x + x2 = -4 + 4

Combine like terms: -45 + 4 = -41
-41 + -12x + x2 = -4 + 4

Combine like terms: -4 + 4 = 0
-41 + -12x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '41' to each side of the equation.
-41 + -12x + 41 + x2 = 0 + 41

Reorder the terms:
-41 + 41 + -12x + x2 = 0 + 41

Combine like terms: -41 + 41 = 0
0 + -12x + x2 = 0 + 41
-12x + x2 = 0 + 41

Combine like terms: 0 + 41 = 41
-12x + x2 = 41

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 = 41 + 36

Reorder the terms:
36 + -12x + x2 = 41 + 36

Combine like terms: 41 + 36 = 77
36 + -12x + x2 = 77

Factor a perfect square on the left side:
(x + -6)(x + -6) = 77

Calculate the square root of the right side: 8.774964387

Break this problem into two subproblems by setting 
(x + -6) equal to 8.774964387 and -8.774964387.

Subproblem 1

x + -6 = 8.774964387 Simplifying x + -6 = 8.774964387 Reorder the terms: -6 + x = 8.774964387 Solving -6 + x = 8.774964387 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 = 8.774964387 + 6 Combine like terms: -6 + 6 = 0 0 + x = 8.774964387 + 6 x = 8.774964387 + 6 Combine like terms: 8.774964387 + 6 = 14.774964387 x = 14.774964387 Simplifying x = 14.774964387

Subproblem 2

x + -6 = -8.774964387 Simplifying x + -6 = -8.774964387 Reorder the terms: -6 + x = -8.774964387 Solving -6 + x = -8.774964387 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 = -8.774964387 + 6 Combine like terms: -6 + 6 = 0 0 + x = -8.774964387 + 6 x = -8.774964387 + 6 Combine like terms: -8.774964387 + 6 = -2.774964387 x = -2.774964387 Simplifying x = -2.774964387

Solution

The solution to the problem is based on the solutions from the subproblems. x = {14.774964387, -2.774964387}

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