Question

find the area of a rectangle whose sides mesure (4x+3) and (2x-1)

Answer 1

We can't find the exact area of this rectangle without knowing x.  However, in terms of x, we can expand (4x+3)(2x-1) to get $8x^2+2x-3$ as the area in terms of x.

Answer 2

A = lw
A = (4x + 3)(2x - 1)
A = 8x² - 4x + 6x - 3
A = 8x² + 2x - 3