A gardner wants to create a triangular garden in the shape of a right triangle with shaortest side length

x-8y ft and the middle length side
x+6y ft. What is an algebraic expression for the area of the garden? Be sure to multiply this out and express in simplist correct mathematical form, including units.

A =(x-8y)(x+6y) / 2

A = (x^2 + 6xy - 8xy -48y^2)/2
A = (x^2 - 2xy - 48y^2)/2
A = (1/2)x^2 -xy - 24y^2 Sq. Ft.