Answer:
f=3
Step-by-step explanation:
f⁴-81
(f²-9)(f²+9)
f²=9
(f² + 9) (f² - 9)
Explanation:
The format of difference of two squares;
(f² + _) (f² - _)
So we will extract the square root of 81 which is 9;
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Answers & Comments
Answer:
f=3
Step-by-step explanation:
f⁴-81
(f²-9)(f²+9)
f²=9
f=3
Answer:
(f² + 9) (f² - 9)
Explanation:
The format of difference of two squares;
(f² + _) (f² - _)
So we will extract the square root of 81 which is 9;
(f² + 9) (f² - 9)