Express the area of the plane figure shown as a polynomial in standard form.

Step-by-step explanation:

The figure consists of two rectangles.

The larger rectangle has the length of (x+4) units and the width of (x-1) units.

The smaller rectangle has the width of (x-(x-1))=(x-x+1)=1 unit and the length of ((x+4)-x)=(x+4-x)=4 units.

The area of the rectangle is

Calculate the area of each rectangle:

So, the area of the whole figure is

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step-by-step explanation: