(5k+4)(6k+9)=0

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Solution for (5k+4)(6k+9)=0 equation:


Simplifying
(5k + 4)(6k + 9) = 0

Reorder the terms:
(4 + 5k)(6k + 9) = 0

Reorder the terms:
(4 + 5k)(9 + 6k) = 0

Multiply (4 + 5k) * (9 + 6k)
(4(9 + 6k) + 5k * (9 + 6k)) = 0
((9 * 4 + 6k * 4) + 5k * (9 + 6k)) = 0
((36 + 24k) + 5k * (9 + 6k)) = 0
(36 + 24k + (9 * 5k + 6k * 5k)) = 0
(36 + 24k + (45k + 30k2)) = 0

Combine like terms: 24k + 45k = 69k
(36 + 69k + 30k2) = 0

Solving
36 + 69k + 30k2 = 0

Solving for variable 'k'.

Factor out the Greatest Common Factor (GCF), '3'.
3(12 + 23k + 10k2) = 0

Factor a trinomial.
3((3 + 2k)(4 + 5k)) = 0

Ignore the factor 3.

Subproblem 1

Set the factor '(3 + 2k)' equal to zero and attempt to solve: Simplifying 3 + 2k = 0 Solving 3 + 2k = 0 Move all terms containing k to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + 2k = 0 + -3 Combine like terms: 3 + -3 = 0 0 + 2k = 0 + -3 2k = 0 + -3 Combine like terms: 0 + -3 = -3 2k = -3 Divide each side by '2'. k = -1.5 Simplifying k = -1.5

Subproblem 2

Set the factor '(4 + 5k)' equal to zero and attempt to solve: Simplifying 4 + 5k = 0 Solving 4 + 5k = 0 Move all terms containing k to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + 5k = 0 + -4 Combine like terms: 4 + -4 = 0 0 + 5k = 0 + -4 5k = 0 + -4 Combine like terms: 0 + -4 = -4 5k = -4 Divide each side by '5'. k = -0.8 Simplifying k = -0.8

Solution

k = {-1.5, -0.8}

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