9(9)+(-1)(-1)=

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Solution for 9(9)+(-1)(-1)= equation:


9(9)+(-1)(-1)=0

We simplify the equation to the form, which is simple to understand 
9(9)+(-1)*(-1)=0

Reorder the terms in parentheses
+(+81)+(-1)*(-1)=0

Remove unnecessary parentheses
+81+(-1+)+*(-1+)=0

Reorder the terms in parentheses
multiplication of parentheses
+81+(+1)=0



Remove unnecessary parentheses
+81+1=0

We move all terms containing  to the left and all other terms to the right. 
0=0-81-1

We simplify left and right side of the equation. 
0=-82

0=-82

The left and right sides are not equal, therefore there is no solution. This equation is invalid.

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