X^2-2X-60=0

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Solution for X^2-2X-60=0 equation:


Simplifying
X2 + -2X + -60 = 0

Reorder the terms:
-60 + -2X + X2 = 0

Solving
-60 + -2X + X2 = 0

Solving for variable 'X'.

Begin completing the square.

Move the constant term to the right:

Add '60' to each side of the equation.
-60 + -2X + 60 + X2 = 0 + 60

Reorder the terms:
-60 + 60 + -2X + X2 = 0 + 60

Combine like terms: -60 + 60 = 0
0 + -2X + X2 = 0 + 60
-2X + X2 = 0 + 60

Combine like terms: 0 + 60 = 60
-2X + X2 = 60

The X term is -2X.  Take half its coefficient (-1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
-2X + 1 + X2 = 60 + 1

Reorder the terms:
1 + -2X + X2 = 60 + 1

Combine like terms: 60 + 1 = 61
1 + -2X + X2 = 61

Factor a perfect square on the left side:
(X + -1)(X + -1) = 61

Calculate the square root of the right side: 7.810249676

Break this problem into two subproblems by setting 
(X + -1) equal to 7.810249676 and -7.810249676.

Subproblem 1

X + -1 = 7.810249676 Simplifying X + -1 = 7.810249676 Reorder the terms: -1 + X = 7.810249676 Solving -1 + X = 7.810249676 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + X = 7.810249676 + 1 Combine like terms: -1 + 1 = 0 0 + X = 7.810249676 + 1 X = 7.810249676 + 1 Combine like terms: 7.810249676 + 1 = 8.810249676 X = 8.810249676 Simplifying X = 8.810249676

Subproblem 2

X + -1 = -7.810249676 Simplifying X + -1 = -7.810249676 Reorder the terms: -1 + X = -7.810249676 Solving -1 + X = -7.810249676 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + X = -7.810249676 + 1 Combine like terms: -1 + 1 = 0 0 + X = -7.810249676 + 1 X = -7.810249676 + 1 Combine like terms: -7.810249676 + 1 = -6.810249676 X = -6.810249676 Simplifying X = -6.810249676

Solution

The solution to the problem is based on the solutions from the subproblems. X = {8.810249676, -6.810249676}

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