Both bots got this wrong:

Which of the following re-expresses the negative square root -6√-20 as a complex number in the standard form a + bi?

-12i√5
-12√5
2i√5
-12√5i

since √20 = 2√5, -6√-20 = -6 * 2√5 i = -12√5 i

the 2nd bot missed this because it interpreted √5i as √(5i) rather than (√5)i

1 answer

The correct re-expression of the negative square root -6√-20 as a complex number in standard form is -12√5i.