0.5k^2+5k+12.5=0

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Solution for 0.5k^2+5k+12.5=0 equation:


Simplifying
0.5k2 + 5k + 12.5 = 0

Reorder the terms:
12.5 + 5k + 0.5k2 = 0

Solving
12.5 + 5k + 0.5k2 = 0

Solving for variable 'k'.

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

Divide each side by '0.5'.
25 + 10k + k2 = 0

Move the constant term to the right:

Add '-25' to each side of the equation.
25 + 10k + -25 + k2 = 0 + -25

Reorder the terms:
25 + -25 + 10k + k2 = 0 + -25

Combine like terms: 25 + -25 = 0
0 + 10k + k2 = 0 + -25
10k + k2 = 0 + -25

Combine like terms: 0 + -25 = -25
10k + k2 = -25

The k term is 10k.  Take half its coefficient (5).
Square it (25) and add it to both sides.

Add '25' to each side of the equation.
10k + 25 + k2 = -25 + 25

Reorder the terms:
25 + 10k + k2 = -25 + 25

Combine like terms: -25 + 25 = 0
25 + 10k + k2 = 0

Factor a perfect square on the left side:
(k + 5)(k + 5) = 0

Calculate the square root of the right side: 0

Break this problem into two subproblems by setting 
(k + 5) equal to 0 and 0.

Subproblem 1

k + 5 = 0 Simplifying k + 5 = 0 Reorder the terms: 5 + k = 0 Solving 5 + k = 0 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + k = 0 + -5 Combine like terms: 5 + -5 = 0 0 + k = 0 + -5 k = 0 + -5 Combine like terms: 0 + -5 = -5 k = -5 Simplifying k = -5

Subproblem 2

k + 5 = 0 Simplifying k + 5 = 0 Reorder the terms: 5 + k = 0 Solving 5 + k = 0 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + k = 0 + -5 Combine like terms: 5 + -5 = 0 0 + k = 0 + -5 k = 0 + -5 Combine like terms: 0 + -5 = -5 k = -5 Simplifying k = -5

Solution

The solution to the problem is based on the solutions from the subproblems. k = {-5, -5}

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