Question

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.

Answer 1

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

Answer 2

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

Answer 3

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

Answer 4

just like what radar said

Answer 5

Yes, and the negative result is not applicable.

Answer 6

oh k

Answer 7

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

Answer 8

\[\pm13\]

Answer 9

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

Answer 10

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

Answer 11

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

Answer 12

Yes indeed.