k*k+9=10k

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Solution for k*k+9=10k equation:


Simplifying
k * k + 9 = 10k

Multiply k * k
k2 + 9 = 10k

Reorder the terms:
9 + k2 = 10k

Solving
9 + k2 = 10k

Solving for variable 'k'.

Reorder the terms:
9 + -10k + k2 = 10k + -10k

Combine like terms: 10k + -10k = 0
9 + -10k + k2 = 0

Factor a trinomial.
(1 + -1k)(9 + -1k) = 0

Subproblem 1

Set the factor '(1 + -1k)' equal to zero and attempt to solve: Simplifying 1 + -1k = 0 Solving 1 + -1k = 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 + -1k = 0 + -1 Combine like terms: 1 + -1 = 0 0 + -1k = 0 + -1 -1k = 0 + -1 Combine like terms: 0 + -1 = -1 -1k = -1 Divide each side by '-1'. k = 1 Simplifying k = 1

Subproblem 2

Set the factor '(9 + -1k)' equal to zero and attempt to solve: Simplifying 9 + -1k = 0 Solving 9 + -1k = 0 Move all terms containing k to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + -1k = 0 + -9 Combine like terms: 9 + -9 = 0 0 + -1k = 0 + -9 -1k = 0 + -9 Combine like terms: 0 + -9 = -9 -1k = -9 Divide each side by '-1'. k = 9 Simplifying k = 9

Solution

k = {1, 9}

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