If `m=2` find the value of :
(i) `m-2`
(ii) `3m-5`
(iii) `9-5m`
(iv) `3m^2-2m-7`

Explanation

Given that, `m=2`

(i) `m-2=2-2=0`

(ii) `3m-5=3(2)-5`

`=6-5=1`

(iii) `9-5m=9-5(2)`

`=9-10=-1`

(iv) `3m^2-2m-7`

`=3(2)^2-2(2)-7`

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