Answer :

evgeniylevi

Answer:

3

Step-by-step explanation:

1. according to the condition ΔACD=ΔACB, then AB=AD.

2. if to re-write AB=AD, then 11=x²+2, ⇒ x=3;-3.

3. the value of the length can not be smaller than '0', then x=3.

the answer A) x=3

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