Question 1126667
P( -5, 4 )
M( -2, 1 )
Let the coordinates of Q be ( x1, y1 )
x-value of Q:
{{{ ( x[1] +(-5) )/2 = -2 }}}
{{{ x[1] - 5 = -4 }}}
{{{ x[1] = 1 }}}
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y-value of Q:
{{{ ( y[1] +4 )/2 = 1 }}}
{{{ y[1] + 4 = 2 }}}
{{{ y[1] = -2 }}}
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the other endpoint is:
Q( 1, -2 )
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check:
{{{ ( 1 +(-5) )/2 = -2 }}}
{{{ 1 - 5 = -4 }}}
{{{ 1 = 1 }}}
and
{{{ ( -2 + 4 )/2 = 1 }}}
{{{ 2 = 2 }}}
OK