Question

The dimensions of a rectangle are x+4 and 3x-1. Write an expression to represent the area of the rectangle.

Answer 1

Step-by-step explanation:

Step 1:  Multiply them together to get the area

$A = L * W$

$A = (x + 4)(3x - 1)$

$A = (x * 3x) + (x * -1) + (4 * 3x) + (4 * -1)$

$A = 3x^2 - x + 12x - 4$

$A = 3x^2 + 11x - 4$

Answer:  $A = 3x^2 + 11x - 4$

Answer 2

Answer:

3x² + 11x - 4

Step-by-step explanation:

Area = length × width

= (x+4)(3x-1)

= 3x² + 12x - x - 4

= 3x² + 11x - 4