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

Given: 

$(i)$. $m-2$

$(ii)$. $3m-5$

$(iii)$. $9-5m$

$(iv)$. $3m^2-2m-7$

$(v)$. $\frac{5m}{2}-4$

To do: To find the value of given expressions if $m=2$.

Solution: 

$(i)$. $m-2$

Putting $m=2$

$=2-2$

$=0$

$(ii)$. $3m-5$

Putting $m=2$

$=3(2)-5$

$=6-5$

$=1$

$(iii)$. $9-5m$

Putting $m=2$

$=9-5(2)$

$=9-10$

$=-1$

$(iv)$. $3m^2-2m-7$

Putting $m=2$

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

$=12-4-7$

$=1$

$(v)$. $\frac{5m}{2}-4$

Putting $m=2$

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

$=5-4$

$=1$

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Updated on: 10-Oct-2022

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