Answer :
Answer:
[tex]Area= 5x^2-18x -8[/tex]
Step-by-step explanation:
If the rectangle show one side of length 5 x +2, and another side of length x - 4, then the area of this rectangle (given by the product of the sides' length) is:
[tex]Area = (5x+2)\,(x-4)\\Area = 5x^2-20x+2x-8\\Area= 5x^2-18x -8[/tex]
which is already written in standard form.