Question 32589
I will help you memorizing algebra for your brother.  You are a good sister though.
x^3 = (x)(x)(x)
1. When x=2, x^3 = 2*2*2 = 8
2. When x=5, x^3 = 5*5*5 = 125
3. When x=3, x^3 = 3*3*3 = 27