If $m = 2$, find the value of:
(i) $m – 2$ (ii) $3m – 5$ (iii) $9 – 5m$
(iv) $3m^2 – 2m – 7$ (v) $\frac{5m}{2}-4$
 

(i) By substituting 2 for m into the given equation, we get,

$=2-2$

$=0$

(ii) By substituting 2 for m into the given equation, we get,

$=3\left(2\right)-5$

$=6-5$

$=1$

(iii) By substituting 2 for m into the given equation, we get,

$=9-5\left(2\right)$

$=9-10$

$=-1$

(iv) By substituting 2 for m into the given equation, we get,

$=3{\left(2\right)}^2-2\left(2\right)-7$

$=12-4-7$

$=12-11$

$=1$

(v) By substituting 2 for m into the given equation, we get,

$=\frac{5\left(2\right)}{2}-4$

$=5-4$

$=1$