diff --git a/source/docs/float/scientific.rst b/source/docs/float/scientific.rst
index fb9a918..54f3c5c 100644
--- a/source/docs/float/scientific.rst
+++ b/source/docs/float/scientific.rst
@@ -8,9 +8,9 @@ Returns a float multiplied by the specified power of 10.
 
 Syntax
 ------
-[0-9].e[0-9]
+[0-9].e(-)?[0-9]
 
-[0-9].E[0-9]
+[0-9].E(-)?[0-9]
 
 Example
 -------
@@ -25,4 +25,4 @@ Example
 >>> 1.1e3
 1100.0       # 1.1 * 10**3
 >>> 8e-2
-0.08         # 8 * 10**-2
\ No newline at end of file
+0.08         # 8 * 10**-2