-k(-8k)-15+3k-2=

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Solution for -k(-8k)-15+3k-2= equation:


Simplifying
-1k(-8k) + -15 + 3k + -2 = 0

Remove parenthesis around (-8k)
-1k * -8k + -15 + 3k + -2 = 0

Reorder the terms for easier multiplication:
-1 * -8k * k + -15 + 3k + -2 = 0

Multiply -1 * -8
8k * k + -15 + 3k + -2 = 0

Multiply k * k
8k2 + -15 + 3k + -2 = 0

Reorder the terms:
-15 + -2 + 3k + 8k2 = 0

Combine like terms: -15 + -2 = -17
-17 + 3k + 8k2 = 0

Solving
-17 + 3k + 8k2 = 0

Solving for variable 'k'.

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

Divide each side by '8'.
-2.125 + 0.375k + k2 = 0

Move the constant term to the right:

Add '2.125' to each side of the equation.
-2.125 + 0.375k + 2.125 + k2 = 0 + 2.125

Reorder the terms:
-2.125 + 2.125 + 0.375k + k2 = 0 + 2.125

Combine like terms: -2.125 + 2.125 = 0.000
0.000 + 0.375k + k2 = 0 + 2.125
0.375k + k2 = 0 + 2.125

Combine like terms: 0 + 2.125 = 2.125
0.375k + k2 = 2.125

The k term is 0.375k.  Take half its coefficient (0.1875).
Square it (0.03515625) and add it to both sides.

Add '0.03515625' to each side of the equation.
0.375k + 0.03515625 + k2 = 2.125 + 0.03515625

Reorder the terms:
0.03515625 + 0.375k + k2 = 2.125 + 0.03515625

Combine like terms: 2.125 + 0.03515625 = 2.16015625
0.03515625 + 0.375k + k2 = 2.16015625

Factor a perfect square on the left side:
(k + 0.1875)(k + 0.1875) = 2.16015625

Calculate the square root of the right side: 1.469747002

Break this problem into two subproblems by setting 
(k + 0.1875) equal to 1.469747002 and -1.469747002.

Subproblem 1

k + 0.1875 = 1.469747002 Simplifying k + 0.1875 = 1.469747002 Reorder the terms: 0.1875 + k = 1.469747002 Solving 0.1875 + k = 1.469747002 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '-0.1875' to each side of the equation. 0.1875 + -0.1875 + k = 1.469747002 + -0.1875 Combine like terms: 0.1875 + -0.1875 = 0.0000 0.0000 + k = 1.469747002 + -0.1875 k = 1.469747002 + -0.1875 Combine like terms: 1.469747002 + -0.1875 = 1.282247002 k = 1.282247002 Simplifying k = 1.282247002

Subproblem 2

k + 0.1875 = -1.469747002 Simplifying k + 0.1875 = -1.469747002 Reorder the terms: 0.1875 + k = -1.469747002 Solving 0.1875 + k = -1.469747002 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '-0.1875' to each side of the equation. 0.1875 + -0.1875 + k = -1.469747002 + -0.1875 Combine like terms: 0.1875 + -0.1875 = 0.0000 0.0000 + k = -1.469747002 + -0.1875 k = -1.469747002 + -0.1875 Combine like terms: -1.469747002 + -0.1875 = -1.657247002 k = -1.657247002 Simplifying k = -1.657247002

Solution

The solution to the problem is based on the solutions from the subproblems. k = {1.282247002, -1.657247002}

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