10k^2+200k+937.5=0

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Solution for 10k^2+200k+937.5=0 equation:


Simplifying
10k2 + 200k + 937.5 = 0

Reorder the terms:
937.5 + 200k + 10k2 = 0

Solving
937.5 + 200k + 10k2 = 0

Solving for variable 'k'.

Begin completing the square.  Divide all terms by
10 the coefficient of the squared term: 

Divide each side by '10'.
93.75 + 20k + k2 = 0

Move the constant term to the right:

Add '-93.75' to each side of the equation.
93.75 + 20k + -93.75 + k2 = 0 + -93.75

Reorder the terms:
93.75 + -93.75 + 20k + k2 = 0 + -93.75

Combine like terms: 93.75 + -93.75 = 0.00
0.00 + 20k + k2 = 0 + -93.75
20k + k2 = 0 + -93.75

Combine like terms: 0 + -93.75 = -93.75
20k + k2 = -93.75

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

Add '100' to each side of the equation.
20k + 100 + k2 = -93.75 + 100

Reorder the terms:
100 + 20k + k2 = -93.75 + 100

Combine like terms: -93.75 + 100 = 6.25
100 + 20k + k2 = 6.25

Factor a perfect square on the left side:
(k + 10)(k + 10) = 6.25

Calculate the square root of the right side: 2.5

Break this problem into two subproblems by setting 
(k + 10) equal to 2.5 and -2.5.

Subproblem 1

k + 10 = 2.5 Simplifying k + 10 = 2.5 Reorder the terms: 10 + k = 2.5 Solving 10 + k = 2.5 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '-10' to each side of the equation. 10 + -10 + k = 2.5 + -10 Combine like terms: 10 + -10 = 0 0 + k = 2.5 + -10 k = 2.5 + -10 Combine like terms: 2.5 + -10 = -7.5 k = -7.5 Simplifying k = -7.5

Subproblem 2

k + 10 = -2.5 Simplifying k + 10 = -2.5 Reorder the terms: 10 + k = -2.5 Solving 10 + k = -2.5 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '-10' to each side of the equation. 10 + -10 + k = -2.5 + -10 Combine like terms: 10 + -10 = 0 0 + k = -2.5 + -10 k = -2.5 + -10 Combine like terms: -2.5 + -10 = -12.5 k = -12.5 Simplifying k = -12.5

Solution

The solution to the problem is based on the solutions from the subproblems. k = {-7.5, -12.5}

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