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Which expression is equal to 2√-28

Which expression is equal to 2√-28-example-1
User Tijana
by
8.1k points

2 Answers

5 votes

Answer:

b) 4i√7

Explanation:

Given problem,

→ 2√-28

Let's solve the given problem,

→ 2√-28

→ 2√(-1) × √(28)

→ 2i × √(4) × √(7)

→ 2i × 2 × √7

→ 4i√7

Hence, option (b) is correct.

User Matteofigus
by
8.5k points
5 votes

Answer:

  • B)
    4i√(7)

--------------------------

We know that:


  • i = √(-1)

Therefore the given expression is simplified as:


  • 2√(-28) =2√(-1*4*7) =2i√(4) √(7) =2i*2√(7) =4i√(7)
User Conrad Poelman
by
8.2k points

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