Example

3(r+2s)=2t-4
a⋅(b-2)=3b
3(r+2s)=2t-4
a⋅(b-2)=3b

Question

$$A=(-1)\times(-1)\times(-1)\times(-1)-$$

Answer

A=1-

Solution


Remove parentheses.
\[A=-1\times -1\times -1\times -1-\]
Simplify  \(1\)  to  \(1\).
\[A=1-\]
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