Question 1019539

a floor is 5m long and 4 wide. a square carpet of sides 3m is laid on the floor. find the area of floor that is not carpeted.
<pre>Area of floor: {{{matrix(1,2,20, m^2)}}}
Area of carpet: {{{matrix(1,2,9, m^2)}}}
Area not covered: 20 - 9, or {{{highlight_green(matrix(1,2,11, m^2))}}}