Question

A rectangle has a height of 3 and a width of 3x2 + 4x.

Express the area of the entire rectangle.

Expression should be expanded.

332

43

Area =

Answer 1

9x² + 12x

Explanation:

We are told that the height of this rectangle is 3 and the width is 3x² + 4x.

Area = height x width

= 3(3x² + 4x)

= 9x² + 12x