x^2-8x-60=-9

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Solution for x^2-8x-60=-9 equation:


Simplifying
x2 + -8x + -60 = -9

Reorder the terms:
-60 + -8x + x2 = -9

Solving
-60 + -8x + x2 = -9

Solving for variable 'x'.

Reorder the terms:
-60 + 9 + -8x + x2 = -9 + 9

Combine like terms: -60 + 9 = -51
-51 + -8x + x2 = -9 + 9

Combine like terms: -9 + 9 = 0
-51 + -8x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '51' to each side of the equation.
-51 + -8x + 51 + x2 = 0 + 51

Reorder the terms:
-51 + 51 + -8x + x2 = 0 + 51

Combine like terms: -51 + 51 = 0
0 + -8x + x2 = 0 + 51
-8x + x2 = 0 + 51

Combine like terms: 0 + 51 = 51
-8x + x2 = 51

The x term is -8x.  Take half its coefficient (-4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
-8x + 16 + x2 = 51 + 16

Reorder the terms:
16 + -8x + x2 = 51 + 16

Combine like terms: 51 + 16 = 67
16 + -8x + x2 = 67

Factor a perfect square on the left side:
(x + -4)(x + -4) = 67

Calculate the square root of the right side: 8.185352772

Break this problem into two subproblems by setting 
(x + -4) equal to 8.185352772 and -8.185352772.

Subproblem 1

x + -4 = 8.185352772 Simplifying x + -4 = 8.185352772 Reorder the terms: -4 + x = 8.185352772 Solving -4 + x = 8.185352772 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + x = 8.185352772 + 4 Combine like terms: -4 + 4 = 0 0 + x = 8.185352772 + 4 x = 8.185352772 + 4 Combine like terms: 8.185352772 + 4 = 12.185352772 x = 12.185352772 Simplifying x = 12.185352772

Subproblem 2

x + -4 = -8.185352772 Simplifying x + -4 = -8.185352772 Reorder the terms: -4 + x = -8.185352772 Solving -4 + x = -8.185352772 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + x = -8.185352772 + 4 Combine like terms: -4 + 4 = 0 0 + x = -8.185352772 + 4 x = -8.185352772 + 4 Combine like terms: -8.185352772 + 4 = -4.185352772 x = -4.185352772 Simplifying x = -4.185352772

Solution

The solution to the problem is based on the solutions from the subproblems. x = {12.185352772, -4.185352772}

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