6*x^2+4 (x^2-1) How do you combine this equation into like terms (^number stands for exponents)

6x^4 - 2x^2 - 4

Step-by-step explanation:

multiply 6x^2 by x^2 once and - 1 once, then multiply 4 by x^2 once and - 1 once

then you will get:

6x^4 - 6x^2 + 4x^2 - 4

and then you will combine like terms

and you will get 6x^4 - 2x^2 - 4