math
posted by Amy on .
I need help with these three problems. They are on a Study Guide and I need some refreshing up of how to do them.
17. Solve the equation using the zero product property...
8n(5n+3)
19. Solve the equation by factoring
5z^22z3=0
20. Solve the equation by completing the square..
x^3x=4
Thank you.. Please show me how you did it if possible.

17 is not an equation.
19. What terms give a product of 3 and add 5 of one and one of the other to give 2?
20. Is there a typo in this question?
I hope this helps. Thanks for asking.