if the sides of a square are lengthend by 8cm, the area becomes 169cm^2. find the lenght of a side of the original square.

Question

radar · Answer

(x+8cm)^2=169
x+8=13
x=5

anonymous · Answer

let side of the original square x
the side of the new square will be 8+x

anonymous · Answer

and (x+8)^2=169 then x=5

anonymous · Answer

just like what radar said

radar · Answer

Yes, and the negative result is not applicable.

anonymous · Answer

oh k

radar · Answer

I did not show the negative answer but you realize that the square root of 169 is -13 as well as +13.

radar · Answer

$$\pm13$$

radar · Answer

So a negative answer would of been -21 but senseless.

radar · Answer

Something very important, which I did not show, but mukushia showed you how to set the problem up.

anonymous · Answer

ok so i got that the original length was 5cm am i right

radar · Answer

Yes indeed.