12k+5k^2=3400

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Solution for 12k+5k^2=3400 equation:


Simplifying
12k + 5k2 = 3400

Solving
12k + 5k2 = 3400

Solving for variable 'k'.

Reorder the terms:
-3400 + 12k + 5k2 = 3400 + -3400

Combine like terms: 3400 + -3400 = 0
-3400 + 12k + 5k2 = 0

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

Divide each side by '5'.
-680 + 2.4k + k2 = 0

Move the constant term to the right:

Add '680' to each side of the equation.
-680 + 2.4k + 680 + k2 = 0 + 680

Reorder the terms:
-680 + 680 + 2.4k + k2 = 0 + 680

Combine like terms: -680 + 680 = 0
0 + 2.4k + k2 = 0 + 680
2.4k + k2 = 0 + 680

Combine like terms: 0 + 680 = 680
2.4k + k2 = 680

The k term is 2.4k.  Take half its coefficient (1.2).
Square it (1.44) and add it to both sides.

Add '1.44' to each side of the equation.
2.4k + 1.44 + k2 = 680 + 1.44

Reorder the terms:
1.44 + 2.4k + k2 = 680 + 1.44

Combine like terms: 680 + 1.44 = 681.44
1.44 + 2.4k + k2 = 681.44

Factor a perfect square on the left side:
(k + 1.2)(k + 1.2) = 681.44

Calculate the square root of the right side: 26.104405758

Break this problem into two subproblems by setting 
(k + 1.2) equal to 26.104405758 and -26.104405758.

Subproblem 1

k + 1.2 = 26.104405758 Simplifying k + 1.2 = 26.104405758 Reorder the terms: 1.2 + k = 26.104405758 Solving 1.2 + k = 26.104405758 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '-1.2' to each side of the equation. 1.2 + -1.2 + k = 26.104405758 + -1.2 Combine like terms: 1.2 + -1.2 = 0.0 0.0 + k = 26.104405758 + -1.2 k = 26.104405758 + -1.2 Combine like terms: 26.104405758 + -1.2 = 24.904405758 k = 24.904405758 Simplifying k = 24.904405758

Subproblem 2

k + 1.2 = -26.104405758 Simplifying k + 1.2 = -26.104405758 Reorder the terms: 1.2 + k = -26.104405758 Solving 1.2 + k = -26.104405758 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '-1.2' to each side of the equation. 1.2 + -1.2 + k = -26.104405758 + -1.2 Combine like terms: 1.2 + -1.2 = 0.0 0.0 + k = -26.104405758 + -1.2 k = -26.104405758 + -1.2 Combine like terms: -26.104405758 + -1.2 = -27.304405758 k = -27.304405758 Simplifying k = -27.304405758

Solution

The solution to the problem is based on the solutions from the subproblems. k = {24.904405758, -27.304405758}

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