Justdothe multiplication on the right. By the "distributive" property, (x+ p)(x+ q)= (x+ p)x+ (x+ p)q. Using the "distributive" property on each of those, . Since p+ q= B and pq= C, .

You try the second one.

By the way, it is a bad idea to use capital letters and small letters to mean the same thing "P" and "p" are different symbols and imply possibly different values.