h^2+20h=49

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Solution for h^2+20h=49 equation:


Simplifying
h2 + 20h = 49

Reorder the terms:
20h + h2 = 49

Solving
20h + h2 = 49

Solving for variable 'h'.

Reorder the terms:
-49 + 20h + h2 = 49 + -49

Combine like terms: 49 + -49 = 0
-49 + 20h + h2 = 0

Begin completing the square.

Move the constant term to the right:

Add '49' to each side of the equation.
-49 + 20h + 49 + h2 = 0 + 49

Reorder the terms:
-49 + 49 + 20h + h2 = 0 + 49

Combine like terms: -49 + 49 = 0
0 + 20h + h2 = 0 + 49
20h + h2 = 0 + 49

Combine like terms: 0 + 49 = 49
20h + h2 = 49

The h term is 20h.  Take half its coefficient (10).
Square it (100) and add it to both sides.

Add '100' to each side of the equation.
20h + 100 + h2 = 49 + 100

Reorder the terms:
100 + 20h + h2 = 49 + 100

Combine like terms: 49 + 100 = 149
100 + 20h + h2 = 149

Factor a perfect square on the left side:
(h + 10)(h + 10) = 149

Calculate the square root of the right side: 12.206555616

Break this problem into two subproblems by setting 
(h + 10) equal to 12.206555616 and -12.206555616.

Subproblem 1

h + 10 = 12.206555616 Simplifying h + 10 = 12.206555616 Reorder the terms: 10 + h = 12.206555616 Solving 10 + h = 12.206555616 Solving for variable 'h'. Move all terms containing h to the left, all other terms to the right. Add '-10' to each side of the equation. 10 + -10 + h = 12.206555616 + -10 Combine like terms: 10 + -10 = 0 0 + h = 12.206555616 + -10 h = 12.206555616 + -10 Combine like terms: 12.206555616 + -10 = 2.206555616 h = 2.206555616 Simplifying h = 2.206555616

Subproblem 2

h + 10 = -12.206555616 Simplifying h + 10 = -12.206555616 Reorder the terms: 10 + h = -12.206555616 Solving 10 + h = -12.206555616 Solving for variable 'h'. Move all terms containing h to the left, all other terms to the right. Add '-10' to each side of the equation. 10 + -10 + h = -12.206555616 + -10 Combine like terms: 10 + -10 = 0 0 + h = -12.206555616 + -10 h = -12.206555616 + -10 Combine like terms: -12.206555616 + -10 = -22.206555616 h = -22.206555616 Simplifying h = -22.206555616

Solution

The solution to the problem is based on the solutions from the subproblems. h = {2.206555616, -22.206555616}

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