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Introduction to Complex Numbers

10. Quadratic Equations / Introduction to Complex Numbers / 문제 5

문제 5

Simplify $\sqrt{- 72}$ fully, extracting perfect-square factors and following notation conventions.

A

$12 i the square root of one half$

B

$i the square root of 72$

C

$36 i$

D

$6 i the square root of 2$