Questions: Write the expression in terms of i and simplify. √(-225)=
Transcript text: Write the expression in terms of $i$ and simplify.
\[
\sqrt{-225}=
\]
Solution
Solution Steps
To solve the given problem, we need to express the square root of a negative number in terms of the imaginary unit \(i\). The imaginary unit \(i\) is defined as \(\sqrt{-1}\). Therefore, we can rewrite \(\sqrt{-225}\) using \(i\).
Solution Approach
Recognize that \(\sqrt{-225}\) can be expressed as \(\sqrt{225} \times \sqrt{-1}\).
Simplify \(\sqrt{225}\) to 15.
Combine the results to get \(15i\).
Step 1: Recognize the Imaginary Unit
To solve \(\sqrt{-225}\), we need to express it in terms of the imaginary unit \(i\), where \(i = \sqrt{-1}\).
Step 2: Simplify the Square Root
We can rewrite \(\sqrt{-225}\) as:
\[
\sqrt{-225} = \sqrt{225 \times -1} = \sqrt{225} \times \sqrt{-1}
\]
Step 3: Calculate the Real and Imaginary Parts
We know that:
\[
\sqrt{225} = 15 \quad \text{and} \quad \sqrt{-1} = i
\]
Thus:
\[
\sqrt{-225} = 15i
\]