Algebra-1 Problems

5.12 Multiplication and Addition of Polynomials

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A rectangular field has sides: (42 + x) ft and (42 - x) ft respectively. The entire field is covered with grass except for the rectangular cemented region with sides: (3 + x) ft and (3 - x) ft respectively. Sides of the cemented region are aligned with those of the grass field. What is the area of the field covered with grass?



A rectangular prism has length of (x + 7), width of (x - 8) and height of ($\frac{x}{5} - 3$). Write a polynomial to represent the volume of the prism.