Which of the following re-expresses the negative square root −6−20−−−−√ as a complex number in the standard form a+bi ?(1 point)

Responses

2i5–√
2 i Start Root 5 End Root

−125i−−√
negative 12 Start Root 5 i End Root

−12i5–√
negative 12 i Start Root 5 End Root

−125–√

1 answer

To re-express the negative square root \( -\sqrt{6 - 20} \) as a complex number in the standard form \( a + bi \), let's first simplify the expression inside the square root.

  1. Calculate \( 6 - 20 \): \[ 6 - 20 = -14 \]

  2. Rewrite the expression: \[ -\sqrt{-14} \]

  3. We can express the square root of a negative number using the imaginary unit \( i \): \[ -\sqrt{-14} = -\sqrt{14} \cdot i \]

  4. Therefore, the expression becomes: \[ -\sqrt{14} \cdot i \]

Now, among the provided options, we need to check which corresponds to this result. The potential answers, however, seem to not directly reflect our simplified form, which could likely stem from a typographical or interpretation error.

The closest form we can deduce related to \( \sqrt{14} \) does not appear in the options given. If you want it in terms of specific options given, then the closest distinctively written form \( a + bi \) would be \( 0 - \sqrt{14} i \), but it looks like there's a disparity with the listed options and could require alerting the source of the question.

Nonetheless, if we were allowed to interpret \( \sqrt{14} \) in a factorized form of \( 14 = 2 \cdot 7 \), we would have \( -\sqrt{2 \cdot 7} \cdot i = - \sqrt{2} \sqrt{7} \cdot i \) but again, this would still not align you with any given answer without clear referencing from your question.

In evaluating the answer choices provided:

  • They require a relation with \( \sqrt{5} \). Hence clarifying your condition on \( 14 \) with respect to \( 5 \) could possibly offer insight into concluding which specifically matches, but abide by searching distinctly.

Consequently, there might be an error in the original options provided. Please consider verifying or re-expressing the options appropriately.