A triangle can't have two right angles because there is 180° in a triangle. Each right angle is 90° so it would be impossible
we are given

we have to solve it by completing square method
step-1: Move 5 on right side


step-2: Break middle term

step-3: Add 6^2 both sides


step-3: Solve for x

we wil get two values
First value is

add both sides 6


Second value is

add both sides 6


so, solutions are

.............Answer
if the length is 8ft and the width is (7+x) then the area would be 56+8x, if x is unknown.