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Simplifying
3k2 + 12 = 39
Reorder the terms:
12 + 3k2 = 39
Solving
12 + 3k2 = 39
Solving for variable 'k'.
Move all terms containing k to the left, all other terms to the right.
Add '-12' to each side of the equation.
12 + -12 + 3k2 = 39 + -12
Combine like terms: 12 + -12 = 0
0 + 3k2 = 39 + -12
3k2 = 39 + -12
Combine like terms: 39 + -12 = 27
3k2 = 27
Divide each side by '3'.
k2 = 9
Simplifying
k2 = 9
Take the square root of each side:
k = {-3, 3}
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