The width of a rectangle is 2ft less than the length. The area is 3ft^2. find the length and width. if you just show me how to get started please

Question

diyadiya · Answer

let l be the length
width =l-2
a= l * w
3= l(l-2)

anonymous · Answer

i still cant come up with the formula

diyadiya · Answer

l^2-2l-3=0

diyadiya · Answer

(l-3)(l+1)=0

diyadiya · Answer

should i continue ?

anonymous · Answer

yea...im just reading to see how to come to a completion for the future

diyadiya · Answer

l-3 =0            l+1=0
l=3                  l=-1 (length cant be negative)
so length = 3

diyadiya · Answer

width= length -2
         =3-2
           =1

anonymous · Answer

Solve the following for L and w:$$\{w\text{ = }L-2,L* w\text{ = }3\}$$

anonymous · Answer

ok so it cant never be negative

anonymous · Answer

if my area is 3^2 so what my width is 1?

anonymous · Answer

The solution is$$\{\{L\to -1,w\to -3\},\{L\to 3,w\to 1\}\} $$The positive solution is the one that makes physical sense.

anonymous · Answer

length =3 width = 1

anonymous · Answer

Correct.  Thank you for the medal.

anonymous · Answer

you are welcome...i appreciate the help from all..hopefully I will get better so I can help someone