ek6307 ek6307
  • 02-11-2019
  • Mathematics
contestada

PLEASE HELP I NEEED HELP ASAP

PLEASE HELP I NEEED HELP ASAP class=

Respuesta :

jimrgrant1 jimrgrant1
  • 02-11-2019

Answer:

B

Step-by-step explanation:

Using the rule of radicals

[tex]\sqrt{a}[/tex] × [tex]\sqrt{b}[/tex] ⇔ [tex]\sqrt{ab}[/tex] and

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

Given

[tex]\sqrt{-80}[/tex]

= [tex]\sqrt{16(5)(-1)}[/tex]

= [tex]\sqrt{16}[/tex] × [tex]\sqrt{5}[/tex] × [tex]\sqrt{-1}[/tex]

= 4 × [tex]\sqrt{5}[/tex] × i

= 4i[tex]\sqrt{5}[/tex] → B

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