Answer:
Step-by-step explanation:
Expression: [tex]x^3-xy+y^2-9[/tex]
7. How could y^2 be rewritten?
y^2 can be rewritten as y*y
8. What does the term xy mean?
The term xy mean that the value of x is multiplied with the value of y or we can sy that we are taking product of x and y.
9. Can you combine all the Xs and Ys in this expression?
No, because the term xy has one x term and one y term and due to this we cannot combine all the Xs and Ys in this expression. We can only combine like terms that have same variables.
