buchanan911jb16
buchanan911jb16 buchanan911jb16
  • 01-03-2017
  • Mathematics
contestada

Which of the following is equivalent to ________?
5i
18 – 5i
18 + 5i
23

Which of the following is equivalent to 5i 18 5i 18 5i 23 class=

Respuesta :

ChandrikaP ChandrikaP
  • 02-03-2017
i=[tex] \sqrt{- 1} [/tex]

so 18-5i is your answer
Answer Link
isyllus
isyllus isyllus
  • 10-06-2019

Answer:

18-5i

B is correct.

Step-by-step explanation:

Given: [tex]18-\sqrt{-25}[/tex]

Simplify the given expression

Inside the square root negative number.

Using complex concept.

[tex]\sqrt{-1}=i[/tex]

[tex]\sqrt{-25}=\sqrt{25}\cdot\sqrt{-1}[/tex]

[tex]\sqrt{-25}=5i[/tex]

Substitute the value into original equation.

[tex]18-\sqrt{-25}\Rightarrow 18-5i[/tex]

Hence, The equivalent expression is 18-5i

Answer Link

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