Question

12.3 exercise 1 2 3 4

Answer 1

`m – 2`

Answer: `m – 2 = 2 – 2 = 0``3m – 5`

Answer: `3m – 5 = 3 × 2 – 5 = 6 – 5 = 1``9 – 5m`

Answer: `9 – 5m = 9 – 5 × 2 = 9 – 10 = - 1``3m^2 – 2m – 7`

Answer: `3m^2 – 2m – 7`
`= 3 × 2^2 – 2 × 2 – 7`
`= 3 × 4 – 4 – 7`
`= 12 – 4 – 7 = 12 – 11 = 1``(5m)/(2) – 4`

Answer: `(5m)/(2) – 4`
`= 5 × 2 ÷2 – 4`` = 5 – 4 = 1`