diff --git a/docs/mhf4u7.md b/docs/mhf4u7.md
index 43cc172..fc95224 100644
--- a/docs/mhf4u7.md
+++ b/docs/mhf4u7.md
@@ -522,7 +522,7 @@ To identify the positive or negative regions of an equation, an interval line or
 
 ### Implicit differentiation
 
-Implicit differentiation differentiates both sides of an equation with respect to $x$ and solves for $\frac{dy}{dx}$ ($y´$). Note that if $y$ is isolated, this is effectively the same as explicit differentiation.
+Implicit differentiation differentiates both sides of an equation with respect to $x$ and solves for $\frac{dy}{dx}$ ($y´$). Note that if $y$ is isolated, this is effectively the same as explicit differentiation. When differentiating implicitly, it must be shown that the derivative of both sides with respect to x ($\frac{d}{dx}$) is being taken.
 
 !!! warning
     The **chain rule** must be applied when differentiating terms that contain $y$.