Answer:
6x^4 -2x^2 -4
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
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