Question

Find the area of the rectangle below by multiplying its length and width.

Answer 1

To find the area of a rectangle, we are going to use the formula: $A=lw$
where
$A$ is the area
$l$ is the length
$w$ is the width 

From our problem we can infer that $l=5x-4$ and $l=(2x-5)$. Lets replace those values in our formula to find the ara of our rectangle:
$A=(5x-4)(2x-5)$
$A=10 x^{2} -25x-8x+20$
$A=10 x^{2} -33x+20$

We can conclude that the area of our rectangle is $A=10 x^{2} -33x+20$.