The point marked +9 goes to ground. The points marked with ground symbol go to your negative supply voltage. The TL071 should be able to handle up to 36V difference between pins 4 and 7 so you should be fine.
As you see, pin7 will still end up being "positive" in relation to pin 4.
Pin3 still ends up being at half the supply voltage (due to R1/R2 voltage divider).
As you see, pin7 will still end up being "positive" in relation to pin 4.
Pin3 still ends up being at half the supply voltage (due to R1/R2 voltage divider).