S. No. Expression Term (which is not a Constant) Numerical Coefficient (i) xy + 4 xy 1 (ii) 13 – y2 – y2 –1 (iii) 13 – y + 5y2 –y 5y2 –1 5 (iv) 4p2q – 3pq2 + 5 4p2q – 3pq2 4 –3 S. No. Expression Term with Factor x Coefficient of x (i) 4x – 3y 4x 4 (ii) 8 – x + y –x –1 (iii) y2x – y y2x y2 (iv) 2z – 5xz – 5xz – 5z S. No. Expression Term with factor y Coefficient of y (i) 4x – 3y – 3y –3 (ii) 8 + yz yz z (iii) yz2 + 5 yz2 z2 (iv) my + m my m S. No. Pair Factors Algebraic factors same or different Like/ Unlike terms Remarks (i) 7x 12y 7, x 12, y Different Unlike The variables in the terms are different. (ii) 15x –21x 15, x –21, x Same Like (iii) – 4ab 7 ba – 4, a, b 7, a, b Same Like Remember ab = ba (iv) 3xy 3x 3, x, y 3, x Different Unlike The variable y is only in one term. (v) 6xy2 9x2y 6, x, y, y 9, x, x, y Different Unlike The variables in the two terms match, but their powers do not match. (vi) pq2 – 4pq2 1, p, q, q – 4, p, q, q Same Like Note, numerical factor 1 is not shown S. Expression Terms No. 1st 2nd 3rd 4th 5th ... 10th … 100th … (i) 2n – 1 1 3 5 7 9 - 19 - - - (ii) 3n + 2 2 5 8 11 - - - - - - (iii) 4n + 1 5 9 13 17 - - - - - - (iv) 7n + 20 27 34 41 48 - - - - - - (v) n2 + 1 2 5 10 17 - - - - 10,001 -