In the image below, I showed my work. What you basically do is find the greatest perfect square in each variable and you pull it out of the radical.
Its 14 (20 chars limit thing)
Answer:
I think it is 7hours and 15 min
Step-by-step explanation:
3x(x+2)-8(x+2)=4
3x^2+6x-8x-17=4
3x^2-2x-21=0
3x^2-9x+7x-21=0
3x(x-3)+7(x-3)=0
(x-3)(3x+7)=0
Either
x-3=0
x=3
Or
3x+7=0
x=-7/3