I need help with finding the area of thisDo please explain though (I’ve got other questions like that and I want to be able to do it on my own)

Answer:
The area is:
[tex]A=x^2+8x+15[/tex]Step-by-step explanation:
Remember that we calculate the area of a rectangle by multiplying its lenght by its width, as following:
[tex]A=l\times w[/tex]Now, notice that the given rectangle has a lenght of:
[tex]x+5[/tex]And a width of:
[tex]x+3[/tex]This way, the area would be:
[tex]\begin{gathered} A=(x+5)(x+3) \\ \rightarrow A=x^2+3x+5x+15 \\ \\ \Rightarrow A=x^2+8x+15 \end{gathered}[/tex]