Answer: x - 5
Step-by-step explanation:
Since, the area of the rectangle = [tex]x^2 - 25=(x+5)(x-5)[/tex]
Length of the rectangle = x+5
Let the width of the rectangle = b
Thus, the area of the rectangle = [tex](x+5)\times b[/tex]
⇒ [tex](x+5)\times b=(x+5)(x-5)[/tex]
⇒ [tex]b=\frac{(x+5)(x-5)}{(x+5)}[/tex]
⇒ [tex]b=x-5[/tex]
Therefore, the expression that shows the width of the rectangle = x-5
