Answer:
9
Step-by-step explanation:
9+10=21
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d^4-8d^2+16
(d^2-4d)(d^2-4d)
(d-2)(d+2)(d-2)(d+2)
Option D is correct
It's the boxplot with these (**) Not symetric and the middle of the box isnt
alined, hope this helps
2×2 mark me brainlist