Final Answer
$\left(1+x\right)^2$
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Step-by-step Solution
Specify the solving method
1
Factor the polynomial $\left(-1-x\right)$ by it's greatest common factor (GCF): $-1$
$\left(-\left(1+x\right)\right)^2$
2
Simplify $\left(-\left(1+x\right)\right)^2$
$\left(1+x\right)^2$
Final Answer
$\left(1+x\right)^2$