To find the area of the rectangle, we multiply the length by the width.
(3x + 5)(5x − 1)
= 15x^2 + 15x - 3x - 5
= 15x^2 + 12x - 5
Therefore, the simplified expression that represents the area of the floor of the library building in square meters is:
15x^2 + 12x - 5.
A library building is in the shape of a rectangle. Its floor has a length of (3x + 5) meters and a width of (5x − 1) meters:
(3x + 5)(5x − 1)
Which of the following simplified expressions represents the area of the floor of the library building in square meters?
28x − 5
15x2 − 5
15x2 + 28x − 5
15x2 + 22x − 5
1 answer
1 answer