What is the simplified form of the expression the quantity x squared plus 4x minus 21 end quantity divided by 4 times the quantity x plus 7 end quantity?
the quantity x plus 3 end quantity divided by quantity x plus 7 end quantity
the quantity x minus 3 end quantity divided by quantity x plus 7 end quantity
the quantity x minus 3 end quantity divided by 4
the quantity x plus 3 end quantity divided by 4