Answer:
[tex]x^2+11x+24[/tex]
Step-by-step explanation:
The area of a rectangle is given by [tex]l\cdot w[/tex]. Plugging in our given values, we get:
[tex]A=(x+3)(x+8)=x^2+8x+3x+24=\fbox{$x^2+11x+24$}[/tex].
This is a polynomial in standard form [tex]\checkmark[/tex]
