this week I was introduced to polynomial operations

for this question we were trying to finch area of the shaded shape. It is easier to find id we find all the possible rectangles first. After that is done we replace all the necessary X’s for 2.4 ( that is what this question asks for) after you have calculated all the equations and expressions with the replaced x and filled in all the new lines, you can begin to find the area. after all these steps it should look something like this.

Notice how we have to rectangles where we originally were looking for the area 8.4×0.4 and 2.4×5

A of 8.4 x 0.4= 3.36

A of .4 x 5 = 12

12 + 3.36 = 15.36