The area of a rectangle with width 3x is given by the expression 12x² - 15x. Write a polynomial expression for the length of the rectangle. (Hint: Area of a rectangle is length*width)
The area of a triangle with height 4x is given by the expression 16x² - 4x. Write a polynomial expression for the base of the triangle. (Hint: Area of a triangle is 1/2Base*Height)