a) Zauważmy, że: 

$st.\left[P\left(x\right)\right]=2$

$st.\left[Q\left(x\right)\right]=5$   

$W\left(x\right)=P\left(x\right)\cdot Q\left(x\right)$  

zatem: 

$\mathbf{s}\mathbf{t}.\left[\mathbf{W}\left(\mathbf{x}\right)\right]=2+5=7$  

 

b) Zauważmy, że: 

$st.\left[P\left(x\right)\right]=3$

$st.\left[Q\left(x\right)\right]=12$   

$W\left(x\right)=P\left(x\right)\cdot Q\left(x\right)$  

zatem: 

$\mathbf{s}\mathbf{t}.\left[\mathbf{W}\left(\mathbf{x}\right)\right]=3+12=15$