Here
- A=B=1 and C=-1
- Q(2,6) is the point
Distance
[tex]\\ \rm\Rrightarrow \dfrac{|Ax+By+C|}{\sqrt{A^2+B^2}}[/tex]
[tex]\\ \rm\Rrightarrow \dfrac{|1(2)+1(6)-4|}{\sqrt{1+1}}[/tex]
[tex]\\ \rm\Rrightarrow \dfrac{8-4}{\sqrt{2}}[/tex]
[tex]\\ \rm\Rrightarrow \dfrac{4}{\sqrt{2}}[/tex]
[tex]\\ \rm\Rrightarrow 2\sqrt{2}units[/tex]
