3 years ago

PLEASE HELP I NEEED HELP ASAP

Mathematics

1 answer:

dolphi86 [110]3 years ago

6 0

Answer:

Step-by-step explanation:

Using the rule of radicals

$\sqrt{a}$ × $\sqrt{b}$ ⇔ $\sqrt{ab}$ and

$\sqrt{-1}$ = i

Given

$\sqrt{-80}$

= $\sqrt{16(5)(-1)}$

= $\sqrt{16}$ × $\sqrt{5}$ × $\sqrt{-1}$

= 4 × $\sqrt{5}$ × i

= 4i $\sqrt{5}$ → B

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