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Help me please this will help my grade !

Help me please this will help my grade !-example-1

2 Answers

3 votes

Answer:

B & D

Explanation:

It can-t be A, because that would mean 20², which equals 400, would equal 20.

B is correct because even though it's negative, negative times negative = positive, which would mean that (-sqrt of 20)(-sqrt of 20)=20.

C is wrong because sqrt -20 is an imaginary number,which is a completely different topic.

D is correct because it's the same thing as B, but without the 2 negaties cancelling each other out.

E is the same as A, except it's '-20' x '-20', whcih is still 400, which is still wrong

Hope this helps :)

User Ferdeen
by
7.4k points
1 vote

Answer:

the answers B and D are correct

User Ankit Goyal
by
7.9k points

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