If the garden has an area of 91ft2, what are the dimensions of the garden? a1 feet wide by a2 feet long frank decides to put a fence around the garden. how many feet of fencing does he need to buy? a3feet

The complete question in the attached figure

Part A) what are the dimensions of the garden?
we know that area of rectangle is 
Area rectangle=91 ft²
[Area rectangle]=b*h--------> (2x+3)*(2+x)------> 4x+2x²+6+3x
2x²+7x+6=91--------> 2x²+7x-85=0

using a graph tool-----------> to resolve the quadratic equation
see the attached figure

the solution is 
x=5 ft
so 
2x+3------> 13 ft
2+x-------> 7 ft

the answer Part A) is 13 ft x 7 ft

Part B)How many feet of fencing does he need to buy?
[perimeter of rectangle]=2b+2h-------> 2*13+2*7--------> 26+14------> 40 ft

the answer Part B) is 40 ft