Question

A rectangle has a height of 7 and a width of a^4+5a^2+4a .

Express the area of the entire rectangle.

Answer 1

7a^6+35a^4+28a^2

Explanation:

7a^2(a^4+5a^2+4)

Answer 2

7a^4 +35a^2 +28a

Explanation:

Area is the product of height and width:

area = height × width

= 7 × (a^4 +5a^2 +4a)

area = 7a^4 +35a^2 +28a . . . . . . use the distributive property