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17.04.2021 •
Mathematics
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Ответ:
Step-by-step explanation:
Given
Required
Find f(-4)
We have that:
For
For
Rewrite as:
Make b the subject
Substitute:
Substitute
in 
To calculate f(-4), we have:
Ответ:
3x^4-75
Step-by-step explanation:
3(x^2+5)(x^2-5)
3(x^4+5x^2-5x^2-25)
3(x^4-25)
3x^4-75
Just multiply each term out and combine like terms.