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Mathematics

1 answer:

Nezavi [6.7K]2 years ago

6 0

Answer:

AD=14

Step-by-step explanation:

Because AB and BC are congruent, and BD=BD, CD must equal AD. Since CD=14, AD also equals 14.

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$i=\sqrt{-1}\\\\\sqrt{-81}=\sqrt{(81)(-1)}=\sqrt{81}\cdot\sqrt{-1}=9i\\\\\sqrt{-25}=\sqrt{(25)(-1)}=\sqrt{25}\cdot\sqrt{-1}=5i\\\\4\sqrt{-81}+\sqrt{-25}=4(9i)+5i=36i+5i=41i$

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Need help with this question ​

Need help with this question