Factor out the greatest common factor
-5x^2 - 5x^3 - 15x^4

Our answer is 

Our greatest common factor, or GCF, is , so when we factor is out, our divide each term by , we get our answer. To check this, we can multiply the back across the parenthesis and see if we get the same result as our initial question.

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Find the area of the rectangle. Then, find the area of the circle. The diameter is given, so take half that to get the radius. Multiply the area of the circle by half. Subtract the area of the half circle from the area of the rectangle.

Step-by-step explanation:

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