Hello, mcinnes!

Did you make a sketch?

A rectangular garden measures 5m x 4m.

Its area is to be tripled by extending each dimension by the same amount.

How much should each dimension extend? Code:

: - - x+5 - - :
- *-------------* -
x | | :
- *---------* _ * - - - - * | :
: | | : | | | x+4
4 | 20 m² | 4 | | | :
: | | : | | | :
- *---------* - *---------*---* -
: - 5 - : : - 5 - : x :

The original garden is 5 by 4 and has an area of 20 m².

The new garden is by and has an area of 60 m².

There is our equation . . . .

Quadratic Formula: .

The positive root is: .