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(2-1)(2+1)=0
We simplify the equation to the form, which is simple to understand
(2-1)*(2+1)=0
Simplifying terms in parentheses
(+1)*(2+1)=0
Simplifying terms in parentheses
(+1)*(+3)=0
Reorder the terms in parentheses
multiplication of parentheses
(+3)=0
Remove unnecessary parentheses
+3=0
We move all terms containing to the left and all other terms to the right.
0=0-3
We simplify left and right side of the equation.
0=-3
0=-3
The left and right sides are not equal, therefore there is no solution. This equation is invalid.
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