if the area rectangle below us 39 square feet find the x value

Answer:
x=5 and x=-11
Step-by-step explanation:
(x-2)(x+8)=39
[tex]x^2+6x-16=39[/tex]
Subtract 39 from both sides
[tex]x^2+6x-55=0[/tex]
Factor:
(x-5)(x+11)=0
Set factors to 0.
x-5 =0
x+11 =0
x=5, x=-11