Question

Write a simplified polynomial expression in standard form to represent the area of the rectangle below:

(See photo)

A. 2x^2 + 3x - 20
B. 2x^2 + 13x - 1
C. 2x^2 + 13x - 20
D. 2x^2 + 3x - 1

Answer 1

A

Explanation:

The area (A) of a rectangle is calculated as

A = length × breadth

= (2x - 5)(x + 4) ← expand using FOIL

= 2x² + 8x - 5x - 20

= 2x² + 3x - 20 → A