x^2-1=73x

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Solution for x^2-1=73x equation:


Simplifying
x2 + -1 = 73x

Reorder the terms:
-1 + x2 = 73x

Solving
-1 + x2 = 73x

Solving for variable 'x'.

Reorder the terms:
-1 + -73x + x2 = 73x + -73x

Combine like terms: 73x + -73x = 0
-1 + -73x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '1' to each side of the equation.
-1 + -73x + 1 + x2 = 0 + 1

Reorder the terms:
-1 + 1 + -73x + x2 = 0 + 1

Combine like terms: -1 + 1 = 0
0 + -73x + x2 = 0 + 1
-73x + x2 = 0 + 1

Combine like terms: 0 + 1 = 1
-73x + x2 = 1

The x term is -73x.  Take half its coefficient (-36.5).
Square it (1332.25) and add it to both sides.

Add '1332.25' to each side of the equation.
-73x + 1332.25 + x2 = 1 + 1332.25

Reorder the terms:
1332.25 + -73x + x2 = 1 + 1332.25

Combine like terms: 1 + 1332.25 = 1333.25
1332.25 + -73x + x2 = 1333.25

Factor a perfect square on the left side:
(x + -36.5)(x + -36.5) = 1333.25

Calculate the square root of the right side: 36.513696061

Break this problem into two subproblems by setting 
(x + -36.5) equal to 36.513696061 and -36.513696061.

Subproblem 1

x + -36.5 = 36.513696061 Simplifying x + -36.5 = 36.513696061 Reorder the terms: -36.5 + x = 36.513696061 Solving -36.5 + x = 36.513696061 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '36.5' to each side of the equation. -36.5 + 36.5 + x = 36.513696061 + 36.5 Combine like terms: -36.5 + 36.5 = 0.0 0.0 + x = 36.513696061 + 36.5 x = 36.513696061 + 36.5 Combine like terms: 36.513696061 + 36.5 = 73.013696061 x = 73.013696061 Simplifying x = 73.013696061

Subproblem 2

x + -36.5 = -36.513696061 Simplifying x + -36.5 = -36.513696061 Reorder the terms: -36.5 + x = -36.513696061 Solving -36.5 + x = -36.513696061 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '36.5' to each side of the equation. -36.5 + 36.5 + x = -36.513696061 + 36.5 Combine like terms: -36.5 + 36.5 = 0.0 0.0 + x = -36.513696061 + 36.5 x = -36.513696061 + 36.5 Combine like terms: -36.513696061 + 36.5 = -0.013696061 x = -0.013696061 Simplifying x = -0.013696061

Solution

The solution to the problem is based on the solutions from the subproblems. x = {73.013696061, -0.013696061}

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