To find the area of the rectangle based on the given dimensions, we start with the height and width.
- Height of the rectangle: \( h = 3x \)
- Width of the rectangle: \( w = 2x - 3 \)
The area \( A \) of a rectangle is calculated using the formula:
\[ A = \text{Height} \times \text{Width} \] Substituting the given values:
\[ A = (3x)(2x - 3) \]
To find the expanded form, we can distribute \( 3x \) across the width:
\[ A = 3x \cdot 2x + 3x \cdot (-3) \]
Calculating each term:
- \( 3x \cdot 2x = 6x^2 \)
- \( 3x \cdot (-3) = -9x \)
Now, combining these results gives us:
\[ A = 6x^2 - 9x \]
Thus, the area of the rectangle, expressed in expanded form, is:
\[ \boxed{6x^2 - 9x} \]