Sagot :
(l+6)(l+6)=121=l^2+6l+6l+36
l^2+12l-85=(l-5)(l+17)
l=5 or l =-17
cannot be negative
therefore was a 5 by 5 map
l^2+12l-85=(l-5)(l+17)
l=5 or l =-17
cannot be negative
therefore was a 5 by 5 map
Answer:
The length of a side of the smaller map is 5 inches.
Step-by-step explanation:
Lets take the original length of a side of the Map is [tex]x[/tex] inches.
So the length of a side if the new Map = [tex]x+6[/tex] inches.
Area of a square = (Length of a side)²
[tex]121=(x+6)^{2}[/tex]
[tex]\sqrt{121} =\sqrt{(x+6)^{2} }[/tex]
So, either
[tex]11=x+6[/tex] or [tex]-11=x+6[/tex]
[tex]5=x[/tex] or [tex]-17=x[/tex]
[tex]x[/tex] cannot be a negative value as it is a length of a square.
Therefore. the length of a side of the smaller map is 5 inches.