Answer: 
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Work Shown:
Explanation:
I replaced each copy of x with x+h. Then I used the FOIL rule to expand things out and combine like terms. The distributive property or the box method are two other pathways you can take.
Step-by-step explanation:
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The answer in standard form is
-z^4 + 3z^2
This is a quartic polynomial
The term with the highest exponent is listed first, then you list the next largest and so on. The like terms are z^2 and 2z^2 which combine to 3z^2
The second question is 48 !!
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