SOLUTION: Please help in solving the following, I have no idea where to start. The area of a square is 81 cm^2. If the same amount is added to one dimenstion and removed from the other,

Question 143190: Please help in solving the following, I have no idea where to start.
The area of a square is 81 cm^2. If the same amount is added to one dimenstion and removed from the other, the resulting rectangle has an area of 9cm^2 less than the area of the original square. How much is added and subtracted.
Thank you so much.
Answer by edjones(8007) (Show Source): You can put this solution on YOUR website!
Let x be the amt. added and subtracted.
(9+x)(9-x)=72
81-x^2=72
-x^2=-9
x^2=9
x=3
.
Check:
(9+3)(9-3)=72 true
.
Ed
RELATED QUESTIONS
A wire 350 mm long is cut in two pieces. The first piece is shaped into a circle, and the (answered by gonzo,solver91311)

I need help solving for x in the following problem: 3(cx-b)+c = ax+d/a The ax+d... (answered by ankor@dixie-net.com)

I have no idea where to start. I am not good with word problems, please help. The area of (answered by rfer)

A wire 350 in. long is cut into two pieces. One piece is formed into a square and the... (answered by oscargut)

Please help with this problem ): I have no idea where to start. A motorboat can go 24 (answered by KMST)

Express in simplest form, in terms of i. 2[SQRT(-81)] - 2[SQRT(-100)] Please help with (answered by jim_thompson5910)

Geometry. A square has sides of length 3x - 2 cm. Express the area of the square as a... (answered by sdmmadam@yahoo.com)

On this problem: A photo is 10 cm longer than it is wide. It is mounted in a frame 2 cm... (answered by solver91311)

Simplify the following quotient of complex numbers into the form a + bi. -9+2i/-8-(9i)= (answered by jim_thompson5910)