X^2-12X-80=

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Solution for X^2-12X-80= equation:


Simplifying
X2 + -12X + -80 = 0

Reorder the terms:
-80 + -12X + X2 = 0

Solving
-80 + -12X + X2 = 0

Solving for variable 'X'.

Begin completing the square.

Move the constant term to the right:

Add '80' to each side of the equation.
-80 + -12X + 80 + X2 = 0 + 80

Reorder the terms:
-80 + 80 + -12X + X2 = 0 + 80

Combine like terms: -80 + 80 = 0
0 + -12X + X2 = 0 + 80
-12X + X2 = 0 + 80

Combine like terms: 0 + 80 = 80
-12X + X2 = 80

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 = 80 + 36

Reorder the terms:
36 + -12X + X2 = 80 + 36

Combine like terms: 80 + 36 = 116
36 + -12X + X2 = 116

Factor a perfect square on the left side:
(X + -6)(X + -6) = 116

Calculate the square root of the right side: 10.770329614

Break this problem into two subproblems by setting 
(X + -6) equal to 10.770329614 and -10.770329614.

Subproblem 1

X + -6 = 10.770329614 Simplifying X + -6 = 10.770329614 Reorder the terms: -6 + X = 10.770329614 Solving -6 + X = 10.770329614 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 = 10.770329614 + 6 Combine like terms: -6 + 6 = 0 0 + X = 10.770329614 + 6 X = 10.770329614 + 6 Combine like terms: 10.770329614 + 6 = 16.770329614 X = 16.770329614 Simplifying X = 16.770329614

Subproblem 2

X + -6 = -10.770329614 Simplifying X + -6 = -10.770329614 Reorder the terms: -6 + X = -10.770329614 Solving -6 + X = -10.770329614 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 = -10.770329614 + 6 Combine like terms: -6 + 6 = 0 0 + X = -10.770329614 + 6 X = -10.770329614 + 6 Combine like terms: -10.770329614 + 6 = -4.770329614 X = -4.770329614 Simplifying X = -4.770329614

Solution

The solution to the problem is based on the solutions from the subproblems. X = {16.770329614, -4.770329614}

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