y=k(k-9)

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Solution for y=k(k-9) equation: 


Simplifying
y = k(k + -9)

Reorder the terms:
y = k(-9 + k)
y = (-9 * k + k * k)
y = (-9k + k2)

Solving
y = -9k + k2

Solving for variable 'y'.

Move all terms containing y to the left, all other terms to the right.

Simplifying
y = -9k + k2

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