Write the coefficient of:
(i) ab in 7abx,(ii) 7a in 7abx;(iii) 5x2 in 5x2−5x;(iv) 8 in a2−8ax+a;(v) 4xy in x2−4xy+y2.
(i) The coefficient of ab in 7abx=7x Ans.(ii) The coefficient of 7a in 7abx=bx Ans.(iii) The coefficient of 5x2 in 5x2−5x=1 Ans.(iv) The coefficient of 8 in a2−8ax+a=−ax Ans.(v) The coefficient of 4xy in x2−4xy+y2=−1 Ans.