Question

Find the real-number root.
sqrt -2.56

Answer 1

\(\bf \sqrt{-2.56}\implies \sqrt{-1\cdot 2.56}\implies \sqrt{-1}\cdot \sqrt{2.56}\implies \sqrt{2.56}\ i\implies ?\)

Answer 2

1.13137085 + 1.13137085 i

Answer 3

It has no real root number?

Answer 4

hmmm

Answer 5

well I'm thinking you're asked for the positive factor of it

Answer 6

\(\bf \sqrt{-2.56}\implies \sqrt{-1\cdot 2.56}\implies \sqrt{-1}\cdot \sqrt{2.56}\implies {\color{brown}{ \sqrt{2.56}}}\ i\implies {\color{brown}{ 1.6}}\ i\)

Answer 7

but yes, the radicand is negative, and the root is even, thus is an imaginary value, so no real root for the whole

Answer 8

Okay thanks :)