2k^2+4k+6=30

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Solution for 2k^2+4k+6=30 equation:


Simplifying
2k2 + 4k + 6 = 30

Reorder the terms:
6 + 4k + 2k2 = 30

Solving
6 + 4k + 2k2 = 30

Solving for variable 'k'.

Reorder the terms:
6 + -30 + 4k + 2k2 = 30 + -30

Combine like terms: 6 + -30 = -24
-24 + 4k + 2k2 = 30 + -30

Combine like terms: 30 + -30 = 0
-24 + 4k + 2k2 = 0

Factor out the Greatest Common Factor (GCF), '2'.
2(-12 + 2k + k2) = 0

Ignore the factor 2.

Subproblem 1

Set the factor '(-12 + 2k + k2)' equal to zero and attempt to solve: Simplifying -12 + 2k + k2 = 0 Solving -12 + 2k + k2 = 0 Begin completing the square. Move the constant term to the right: Add '12' to each side of the equation. -12 + 2k + 12 + k2 = 0 + 12 Reorder the terms: -12 + 12 + 2k + k2 = 0 + 12 Combine like terms: -12 + 12 = 0 0 + 2k + k2 = 0 + 12 2k + k2 = 0 + 12 Combine like terms: 0 + 12 = 12 2k + k2 = 12 The k term is 2k. Take half its coefficient (1). Square it (1) and add it to both sides. Add '1' to each side of the equation. 2k + 1 + k2 = 12 + 1 Reorder the terms: 1 + 2k + k2 = 12 + 1 Combine like terms: 12 + 1 = 13 1 + 2k + k2 = 13 Factor a perfect square on the left side: (k + 1)(k + 1) = 13 Calculate the square root of the right side: 3.605551275 Break this problem into two subproblems by setting (k + 1) equal to 3.605551275 and -3.605551275.

Subproblem 1

k + 1 = 3.605551275 Simplifying k + 1 = 3.605551275 Reorder the terms: 1 + k = 3.605551275 Solving 1 + k = 3.605551275 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + k = 3.605551275 + -1 Combine like terms: 1 + -1 = 0 0 + k = 3.605551275 + -1 k = 3.605551275 + -1 Combine like terms: 3.605551275 + -1 = 2.605551275 k = 2.605551275 Simplifying k = 2.605551275

Subproblem 2

k + 1 = -3.605551275 Simplifying k + 1 = -3.605551275 Reorder the terms: 1 + k = -3.605551275 Solving 1 + k = -3.605551275 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + k = -3.605551275 + -1 Combine like terms: 1 + -1 = 0 0 + k = -3.605551275 + -1 k = -3.605551275 + -1 Combine like terms: -3.605551275 + -1 = -4.605551275 k = -4.605551275 Simplifying k = -4.605551275

Solution

The solution to the problem is based on the solutions from the subproblems. k = {2.605551275, -4.605551275}

Solution

k = {2.605551275, -4.605551275}

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