Expand \((y + 11z – 5)(8y + 5)\).
 
Answer:
 
\((y + 11z – 5)8y\) \(=\) iyi+izy−iy
 
\((y + 11z – 5) 5\) \(=\) iy+iz−i
 
\((y + 11z – 5)(8y + 5)\) \(=\) iyi−iy+iyz+iz−i