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➷ The best estimate would be B. 0.9
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Answer:
6
Step-by-step explanation:
9-3=6
Answer:

Step-by-step explanation:
the answer is :- .

Answer:
2i and -2i
Step-by-step explanation:
I'll change u to x to be easier to understand.
x^2 = -4
sqrt(x^2) = sqrt(-4)
sqrt(-4) = 2i, or -2i