(-9)x(-9)=

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Solution for (-9)x(-9)= equation: 


Simplifying
(-9) * x(-9) = 0

Reorder the terms for easier multiplication:
-9 * -9x = 0

Multiply -9 * -9
81x = 0

Solving
81x = 0

Solving for variable 'x'.

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

Divide each side by '81'.
x = 0

Simplifying
x = 0

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