Answer:
8
Step-by-step explanation:i got it wrong to see what the answer was :)
You would take half of the x term...and square it
so half of 8 is 4....4^2 = 16
u would add 16 to each side
Answer:
7.94
Step-by-step explanation:

Answer:
x =0 and x = 4
Step-by-step explanation:
It is a quadratic function and hence will have two roots. It cuts graph at 2 points( x - axis ). Hence has two roots.
I think you got confused with the 50 and 90.
Read my NOTE there it will surely help you answering other questions like this