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Simplifying
9k2 + 10 = 91
Reorder the terms:
10 + 9k2 = 91
Solving
10 + 9k2 = 91
Solving for variable 'k'.
Move all terms containing k to the left, all other terms to the right.
Add '-10' to each side of the equation.
10 + -10 + 9k2 = 91 + -10
Combine like terms: 10 + -10 = 0
0 + 9k2 = 91 + -10
9k2 = 91 + -10
Combine like terms: 91 + -10 = 81
9k2 = 81
Divide each side by '9'.
k2 = 9
Simplifying
k2 = 9
Take the square root of each side:
k = {-3, 3}
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