(4k-1)*(k+2)=

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Solution for (4k-1)*(k+2)= equation:


Simplifying
(4k + -1)(k + 2) = 0

Reorder the terms:
(-1 + 4k)(k + 2) = 0

Reorder the terms:
(-1 + 4k)(2 + k) = 0

Multiply (-1 + 4k) * (2 + k)
(-1(2 + k) + 4k * (2 + k)) = 0
((2 * -1 + k * -1) + 4k * (2 + k)) = 0
((-2 + -1k) + 4k * (2 + k)) = 0
(-2 + -1k + (2 * 4k + k * 4k)) = 0
(-2 + -1k + (8k + 4k2)) = 0

Combine like terms: -1k + 8k = 7k
(-2 + 7k + 4k2) = 0

Solving
-2 + 7k + 4k2 = 0

Solving for variable 'k'.

Factor a trinomial.
(-2 + -1k)(1 + -4k) = 0

Subproblem 1

Set the factor '(-2 + -1k)' equal to zero and attempt to solve: Simplifying -2 + -1k = 0 Solving -2 + -1k = 0 Move all terms containing k to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + -1k = 0 + 2 Combine like terms: -2 + 2 = 0 0 + -1k = 0 + 2 -1k = 0 + 2 Combine like terms: 0 + 2 = 2 -1k = 2 Divide each side by '-1'. k = -2 Simplifying k = -2

Subproblem 2

Set the factor '(1 + -4k)' equal to zero and attempt to solve: Simplifying 1 + -4k = 0 Solving 1 + -4k = 0 Move all terms containing k to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + -4k = 0 + -1 Combine like terms: 1 + -1 = 0 0 + -4k = 0 + -1 -4k = 0 + -1 Combine like terms: 0 + -1 = -1 -4k = -1 Divide each side by '-4'. k = 0.25 Simplifying k = 0.25

Solution

k = {-2, 0.25}

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