What are some good notes I can use to study for my algebra exam tomorrow?​

What are the soultion(s) to the quadratic equation 40- x^2=0

Jose bought 20 shares of netflix at the close price of $117.98. in a few years, jose sells all of his shares at $128.34. how much money did jose make? a.) $192.50 b.) $207.20 c.) $212.50 d.) $224.60

Which of the following is true for the relation f(x)=2x^2+1