
Taking 4 out from first two terms, we will get

Now we divide the coefficient of x by 2 and add and subtract the square of the result, we will get

Distributing 4

Cancelling 9

And that's the required standard form.
A=34.547237
b=2.547237
determined by trial and error with a calculator
The answer is 60 you just need to use factions
Answer: 480
Step-by-step explanation:
8x6x10=480
48x10
480
A.0 I don't actually know