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First, square both sides to elimate the square root-

Your equation becomes: X2 +16X +64 = 5X + 35
Group everything: X2 +11X +29 = 0

Find delta, the discrimant: Delta = 5

X1 = (-11...

Click on Start, select Shutdown and select re-start-
If you do not know how to do that, just press on the Power button and hold it for a few sec until the PC turn off. Then wait a minute before...

Suppose you have 5 numbers: 10, 15, 20, 25, 30
The average is 20.
Now, if we know the average, the number of observations which are 5 on this example,
Then, the missing number is 5*20 -...