Add: (i) 3mn, − 5mn, 8mn, −4mn (ii) t − 8tz, 3tz − z, z �

1.	Add: (i) 3mn, − 5mn, 8mn, −4mn (ii) t − 8tz, 3tz − z, z − t (iii) − 7mn + 5, 12mn + 2, 9mn − 8, − 2mn − 3 (iv) a + b − 3, b − a + 3, a − b + 3 (v) 14x + 10y − 12xy − 13, 18 − 7x − 10y + 8xy, 4xy (vi) 5m − 7n, 3n − 4m + 2, 2m − 3mn − 5 (vii) 4x2y, − 3xy2, − 5xy2, 5x2y (viii) 3p2q2 − 4pq + 5, − 10p2q2, 15 + 9pq + 7p2q2 (ix) ab − 4a, 4b − ab, 4a − 4b (x) x2 − y2 − 1 , y2 − 1 − x2, 1− x2 − y2
Answer» Add: (i) 3mn, − 5mn, 8mn, −4mn (ii) t − 8tz, 3tz − z, z − t (iii) − 7mn + 5, 12mn + 2, 9mn − 8, − 2mn − 3 (iv) a + b − 3, b − a + 3, a − b + 3 (v) 14x + 10y − 12xy − 13, 18 − 7x − 10y + 8xy, 4xy (vi) 5m − 7n, 3n − 4m + 2, 2m − 3mn − 5 (vii) 4x²y, − 3xy², − 5xy², 5x²y (viii) 3p²q² − 4pq + 5, − 10p²q², 15 + 9pq + 7p²q² (ix) ab − 4a, 4b − ab, 4a − 4b (x) x²− y² − 1 , y² − 1 − x², 1− x² − y²

Add: (i) 3mn, − 5mn, 8mn, −4mn (ii) t − 8tz, 3tz − z, z − t (iii) − 7mn + 5, 12mn + 2, 9mn − 8, − 2mn − 3 (iv) a + b − 3, b − a + 3, a − b + 3 (v) 14x + 10y − 12xy − 13, 18 − 7x − 10y + 8xy, 4xy (vi) 5m − 7n, 3n − 4m + 2, 2m − 3mn − 5 (vii) 4x2y, − 3xy2, − 5xy2, 5x2y (viii) 3p2q2 − 4pq + 5, − 10p2q2, 15 + 9pq + 7p2q2 (ix) ab − 4a, 4b − ab, 4a − 4b (x) x2 − y2 − 1 , y2 − 1 − x2, 1− x2 − y2

Answer»

Add:

(i) 3mn, − 5mn, 8mn, −4mn

(ii) t − 8tz, 3tz − z, z
− t

(iii) − 7mn + 5, 12mn + 2, 9mn − 8,
− 2mn − 3

(iv) a + b − 3, b − a + 3, a
− b + 3

(v) 14x + 10y − 12xy − 13, 18 −
7x − 10y + 8xy, 4xy

(vi) 5m − 7n, 3n − 4m + 2, 2m
− 3mn − 5

(vii) 4x²y, − 3xy²,
− 5xy², 5x²y

(viii) 3p²q² − 4pq + 5,
− 10p²q², 15 + 9pq +
7p²q²

(ix) ab − 4a, 4b − ab, 4a
− 4b

(x) x²− y² − 1 , y²
− 1 − x², 1− x²
− y²

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