Question

What is 9x squared minus x squared?

Answer 1

8x^3

Answer 2

8x^2

Answer 3

8x^2+2x
the only thing you can do here is factor out an x
x(8x+2)

Answer 4

YOu can only add exponents if there are to teh same degree

Answer 5

Let me rephrase that, you can only add numbers that have the same exponent.
Ex: 8x^2+2x^2=10x^2
Also, you only add the exponents when you are multiplying them.
Ex: 8x(2x+2)=16x^2+16x