Answer:
4x - 8 - 32/x
Step-by-step explanation:
From the expression xy = 4, y = 4/x
Substituting y = 4/x into the expression y(x-4)(x+2) and expanding;
= y(x-4)(x+2)
= 4/x(x-4)(x+2)
On expansion;
= (4-16/x)(x+2)
= 4x+4(2)-(16/x)x-(16/x)2
= 4x+8-16-32/x
= 4x-8-32/x
The equivalent expression is 4x - 8 - 32/x
