h^2-3h=258

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Solution for h^2-3h=258 equation:


Simplifying
h2 + -3h = 258

Reorder the terms:
-3h + h2 = 258

Solving
-3h + h2 = 258

Solving for variable 'h'.

Reorder the terms:
-258 + -3h + h2 = 258 + -258

Combine like terms: 258 + -258 = 0
-258 + -3h + h2 = 0

Begin completing the square.

Move the constant term to the right:

Add '258' to each side of the equation.
-258 + -3h + 258 + h2 = 0 + 258

Reorder the terms:
-258 + 258 + -3h + h2 = 0 + 258

Combine like terms: -258 + 258 = 0
0 + -3h + h2 = 0 + 258
-3h + h2 = 0 + 258

Combine like terms: 0 + 258 = 258
-3h + h2 = 258

The h term is -3h.  Take half its coefficient (-1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
-3h + 2.25 + h2 = 258 + 2.25

Reorder the terms:
2.25 + -3h + h2 = 258 + 2.25

Combine like terms: 258 + 2.25 = 260.25
2.25 + -3h + h2 = 260.25

Factor a perfect square on the left side:
(h + -1.5)(h + -1.5) = 260.25

Calculate the square root of the right side: 16.132265805

Break this problem into two subproblems by setting 
(h + -1.5) equal to 16.132265805 and -16.132265805.

Subproblem 1

h + -1.5 = 16.132265805 Simplifying h + -1.5 = 16.132265805 Reorder the terms: -1.5 + h = 16.132265805 Solving -1.5 + h = 16.132265805 Solving for variable 'h'. Move all terms containing h to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + h = 16.132265805 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + h = 16.132265805 + 1.5 h = 16.132265805 + 1.5 Combine like terms: 16.132265805 + 1.5 = 17.632265805 h = 17.632265805 Simplifying h = 17.632265805

Subproblem 2

h + -1.5 = -16.132265805 Simplifying h + -1.5 = -16.132265805 Reorder the terms: -1.5 + h = -16.132265805 Solving -1.5 + h = -16.132265805 Solving for variable 'h'. Move all terms containing h to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + h = -16.132265805 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + h = -16.132265805 + 1.5 h = -16.132265805 + 1.5 Combine like terms: -16.132265805 + 1.5 = -14.632265805 h = -14.632265805 Simplifying h = -14.632265805

Solution

The solution to the problem is based on the solutions from the subproblems. h = {17.632265805, -14.632265805}

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