Question

A rectangle has a height of w^2+3w+9 and a width of w^2+2 express the area of the entire rectangle

Answer 1

w^4 + 3w^3 + 11w^2 + 6w + 18.

Explanation:

Area = height * width

= (w^2 + 2)(w^2 + 3w + 9)

= w^2(w^2 + 3w + 9) + 2(w^2 + 3w + 9)

= w^4 + 3w^3 + 9w^2 + 2w^2 + 6w + 18

= w^4 + 3w^3 + 11w^2 + 6w + 18.

Answer 2

w⁴ + 3w³ + 11w² + 6w + 18

Explanation:

Rectanle area = height * width

area = (w²+3w+9)(w² + 2)

= w²*w² + w²*2 + 3w*w² + 3w*2 + 9*w² + 9*2

= w⁴ + 2w² + 3w³ + 6w + 9w² + 18

= w⁴+ 3w³ + (9w²+2w²) + 6w + 18

= w⁴ + 3w³ + 11w² + 6w + 18