Given
midpoint of AB is M(-1,7)
coordinates of A (4,8)
Find
coordinates of B
Explanation
as we know that corodinate of midpoint is given by
[tex]x=\frac{x_1+x_2}{2},y=\frac{y_1+y_2}{2}[/tex]
so ,
so
[tex]\begin{gathered} -1=\frac{4+x_2}{2} \\ x_2=-6 \end{gathered}[/tex]
and
[tex]\begin{gathered} 7=\frac{8+y_2}{2} \\ y_2=6 \end{gathered}[/tex]
Final Answer
Therefore , the coordinates of B are (-6 , 6)
