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(ii) The coefficient of 7a in 7abx = bx(iii) The coefficient of 5x^{2}^{ }in 5x^{2} – 5x = 1(iv) The coefficient of 8 in a^{2} – 8ax + a = – ax(v) The coefficient of 4xy in x^{2}^{ }– 4xy + y^{2} = -1