If \[(-4,5)\] is one vertex and \[7x-y+8=0\] is one diagonal of a square, then he equation of second diagonal is

If \[(-4,5)\] is one vertex and \[7x-y+8=0\] is one diagonal of a squa

1.	If \[(-4,5)\] is one vertex and \[7x-y+8=0\] is one diagonal of a square, then he equation of second diagonal is
A.	\[x+3y=21\]
B.	\[2x-3y=7\]
C.	\[x+7y=31\]
D.	\[2x+3y=21\]
Answer» D. \[2x+3y=21\]

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If \[(-4,5)\] is one vertex and \[7x-y+8=0\] is one diagonal of a square, then he equation of second diagonal is

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