Hello : <span>a single expression is : A = xy +zk x : </span> width1 y : <span>length1 z : </span>width2 k : <span>length2 A : </span><span>the total area of the two rooms note : A1 = xy ........</span>area of the room 1<span> A2 = zk </span>.......area of the room 2