frecy Group Title The length of a rectangle is 2 cm greater than the width. The area is 80 cm. Find the length and width. one year ago one year ago

1. irkiz

let the width by x cm length= (x+2)cm area = (x+2) times (x) = 80

2. Fosterthepeople

fLength 10cm Width 8 cm Area = Length x Width 80cm(cubed) = 10cm x 8cm

3. irkiz

$(x+2) \times x = 80$ $x ^{2} + 2x-80 = 0$

4. irkiz

solve the equation and get x

5. irkiz

or you could do trial and error like fosterthepeople

6. irkiz

but that would be hard for a larger area in another similar question

7. frecy

how did you get 80?

8. irkiz

80 is the area

9. irkiz

10. Fosterthepeople

did you see how i did it up there?

11. frecy

Yup, I saw it.

12. frecy

Irkiz and Fosterthepeople THANKS GUYS! BIG HELP!

13. Fosterthepeople

no problem :P